From 0f5f4e24401f6f1cfd79436a602db20187397d39 Mon Sep 17 00:00:00 2001
From: Carol <cnassuna@gmail.com>
Date: Sun, 20 Sep 2026 22:20:03 +0100
Subject: [PATCH 1/3] update to all files sprint-2 key-exercises, mandatory
 errors and mandatory-interpret folders

---
 Sprint-2a/1-key-exercises/1-count.js          |  8 +++++
 Sprint-2a/1-key-exercises/2-initials.js       | 14 ++++++++
 Sprint-2a/1-key-exercises/3-paths.js          | 28 +++++++++++++++
 Sprint-2a/1-key-exercises/4-random.js         | 15 ++++++++
 Sprint-2a/2-mandatory-errors/0.js             |  4 +++
 Sprint-2a/2-mandatory-errors/1.js             |  9 +++++
 Sprint-2a/2-mandatory-errors/2.js             |  9 +++++
 Sprint-2a/2-mandatory-errors/3.js             | 16 +++++++++
 Sprint-2a/2-mandatory-errors/4.js             |  7 ++++
 .../1-percentage-change.js                    | 30 ++++++++++++++++
 .../3-mandatory-interpret/2-time-format.js    | 31 ++++++++++++++++
 .../3-mandatory-interpret/3-to-pounds.js      | 26 ++++++++++++++
 Sprint-2a/4-stretch-explore/chrome.md         | 15 ++++++++
 Sprint-2a/4-stretch-explore/objects.md        | 16 +++++++++
 Sprint-2a/README.md                           | 35 +++++++++++++++++++
 15 files changed, 263 insertions(+)
 create mode 100644 Sprint-2a/1-key-exercises/1-count.js
 create mode 100644 Sprint-2a/1-key-exercises/2-initials.js
 create mode 100644 Sprint-2a/1-key-exercises/3-paths.js
 create mode 100644 Sprint-2a/1-key-exercises/4-random.js
 create mode 100644 Sprint-2a/2-mandatory-errors/0.js
 create mode 100644 Sprint-2a/2-mandatory-errors/1.js
 create mode 100644 Sprint-2a/2-mandatory-errors/2.js
 create mode 100644 Sprint-2a/2-mandatory-errors/3.js
 create mode 100644 Sprint-2a/2-mandatory-errors/4.js
 create mode 100644 Sprint-2a/3-mandatory-interpret/1-percentage-change.js
 create mode 100644 Sprint-2a/3-mandatory-interpret/2-time-format.js
 create mode 100644 Sprint-2a/3-mandatory-interpret/3-to-pounds.js
 create mode 100644 Sprint-2a/4-stretch-explore/chrome.md
 create mode 100644 Sprint-2a/4-stretch-explore/objects.md
 create mode 100644 Sprint-2a/README.md

diff --git a/Sprint-2a/1-key-exercises/1-count.js b/Sprint-2a/1-key-exercises/1-count.js
new file mode 100644
index 000000000..baa67cfba
--- /dev/null
+++ b/Sprint-2a/1-key-exercises/1-count.js
@@ -0,0 +1,8 @@
+let count = 0;
+
+count = count + 1;
+
+// Line 1 is a variable declaration, creating the count variable with an initial value of 0
+// Describe what line 3 is doing, in particular focus on what = is doing
+
+//Answer: The = means assignment. The value of count is 0 but it increments by 1
\ No newline at end of file
diff --git a/Sprint-2a/1-key-exercises/2-initials.js b/Sprint-2a/1-key-exercises/2-initials.js
new file mode 100644
index 000000000..8da507f7e
--- /dev/null
+++ b/Sprint-2a/1-key-exercises/2-initials.js
@@ -0,0 +1,14 @@
+const firstName = "Creola";
+const middleName = "Katherine";
+const lastName = "Johnson";
+// const initial = "initials";
+// const index = 1;
+
+// console.log('The ${Initial} ${index} is ${firstName.charAt(index)}');
+// Declare a variable called initials that stores the first character of each string.
+// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
+
+const initials = firstName[0] + middleName[0] + lastName[0];
+console.log(initials);
+
+// https://www.google.com/search?q=get+first+character+of+string+mdn
diff --git a/Sprint-2a/1-key-exercises/3-paths.js b/Sprint-2a/1-key-exercises/3-paths.js
new file mode 100644
index 000000000..6becd448d
--- /dev/null
+++ b/Sprint-2a/1-key-exercises/3-paths.js
@@ -0,0 +1,28 @@
+// The diagram below shows the different names for parts of a file path on a Unix operating system
+
+// ┌─────────────────────┬────────────┐
+// │          dir        │    base    │
+// ├──────┬              ├──────┬─────┤
+// │ root │              │ name │ ext │
+// "  /    home/user/dir / file  .txt "
+// └──────┴──────────────┴──────┴─────┘
+
+// (All spaces in the "" line should be ignored. They are purely for formatting.)
+
+const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
+const lastSlashIndex = filePath.lastIndexOf("/");
+const base = filePath.slice(lastSlashIndex + 1);
+console.log(`The base part of ${filePath} is ${base}`);
+// console.log('The dir path of ${dir} is ${filePath}.${lastSlashIndex}'); 
+
+
+// Create a variable to store the dir part of the filePath variable
+// Create a variable to store the ext part of the variable
+
+const dir = filePath.slice(0, lastSlashIndex);
+const ext = base.slice(base.lastIndexOf("."));
+
+console.log(`The dir part of ${filePath} is ${dir}`);
+console.log(`The ext part of ${base} is ${ext}`);
+
+// https://www.google.com/search?q=slice+mdn
\ No newline at end of file
diff --git a/Sprint-2a/1-key-exercises/4-random.js b/Sprint-2a/1-key-exercises/4-random.js
new file mode 100644
index 000000000..7ac6f11d6
--- /dev/null
+++ b/Sprint-2a/1-key-exercises/4-random.js
@@ -0,0 +1,15 @@
+const minimum = 1;
+const maximum = 100;
+
+const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+// (0.68 * 100 ) + 1
+console.log(num)
+
+// In this exercise, you will need to work out what num represents?
+// Try breaking down the expression and using documentation to explain what it means
+// It will help to think about the order in which expressions are evaluated
+// Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+// Answer: For calculations i utilised BODMAS formula solving numbers in brackets first, multiplication, subtraction and addition
+// I used 0.68 for math.floor(random number) + 1
+// Sum = 69
diff --git a/Sprint-2a/2-mandatory-errors/0.js b/Sprint-2a/2-mandatory-errors/0.js
new file mode 100644
index 000000000..58b5e69c3
--- /dev/null
+++ b/Sprint-2a/2-mandatory-errors/0.js
@@ -0,0 +1,4 @@
+//This is just an instruction for the first activity - but it is just for human consumption
+// We don't want the computer to run these 2 lines - how can we solve this problem?
+
+// I have commented out the lines. The computer removes commented lines from code compilation
\ No newline at end of file
diff --git a/Sprint-2a/2-mandatory-errors/1.js b/Sprint-2a/2-mandatory-errors/1.js
new file mode 100644
index 000000000..58a6230d8
--- /dev/null
+++ b/Sprint-2a/2-mandatory-errors/1.js
@@ -0,0 +1,9 @@
+// trying to create an age variable and then reassign the value by 1
+
+let age = 33;
+age = age + 1;
+
+console.log(age)
+
+// The TypeError: Assignment to constant variable implies we are trying to reassign the variable twice.
+// This case, I have used let instead in order to allow the variable to be reused.
\ No newline at end of file
diff --git a/Sprint-2a/2-mandatory-errors/2.js b/Sprint-2a/2-mandatory-errors/2.js
new file mode 100644
index 000000000..fa92713c9
--- /dev/null
+++ b/Sprint-2a/2-mandatory-errors/2.js
@@ -0,0 +1,9 @@
+// Currently trying to print the string "I was born in Bolton" but it isn't working...
+// what's the error ?
+
+const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+
+
+// The error is ReferenceError: Cannot access 'cityOfBirth' before initialization
+// Answer: I switched the order by declaring the const first before calling /printing 
diff --git a/Sprint-2a/2-mandatory-errors/3.js b/Sprint-2a/2-mandatory-errors/3.js
new file mode 100644
index 000000000..13addc153
--- /dev/null
+++ b/Sprint-2a/2-mandatory-errors/3.js
@@ -0,0 +1,16 @@
+const cardNumber = 4533787178994213;
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(last4Digits)
+
+
+// The last4Digits variable should store the last 4 digits of cardNumber
+// However, the code isn't working
+// Before running the code, make and explain a prediction about why the code won't work
+// Then run the code and see what error it gives.
+// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
+// Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+//Prediction was the code would run successfully without error although with the wrong results due to absence of syntax errors in the file
+// Error returned: TypeError: cardNumber.slice is not a function
+// Lesson learnt here; slice method is only available for strings or arrays not numbers
+// So converted the cardNumber into a string first
diff --git a/Sprint-2a/2-mandatory-errors/4.js b/Sprint-2a/2-mandatory-errors/4.js
new file mode 100644
index 000000000..b9c0d88d3
--- /dev/null
+++ b/Sprint-2a/2-mandatory-errors/4.js
@@ -0,0 +1,7 @@
+const twelveHourClockTime = "8:53pm";
+const twentyFourHourClockTime = "20:53";
+console.log(twelveHourClockTime);
+console.log(twentyFourHourClockTime);
+
+// Error - SyntaxError: Invalid or unexpected token
+// lesson learnt - variables cannot start with a number
\ No newline at end of file
diff --git a/Sprint-2a/3-mandatory-interpret/1-percentage-change.js b/Sprint-2a/3-mandatory-interpret/1-percentage-change.js
new file mode 100644
index 000000000..a173aa8b5
--- /dev/null
+++ b/Sprint-2a/3-mandatory-interpret/1-percentage-change.js
@@ -0,0 +1,30 @@
+let carPrice = "10,000";
+let priceAfterOneYear = "8,543";
+
+carPrice = Number(carPrice.replaceAll(",", ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
+
+const priceDifference = carPrice - priceAfterOneYear;
+const percentageChange = (priceDifference / carPrice) * 100;
+
+console.log(`The percentage change is ${percentageChange}`);
+
+// Read the code and then answer the questions below
+
+// a) How many function calls are there in this file? Write down all the lines where a function call is made
+// 2
+//carPrice = Number(carPrice.replaceAll(",", ""));
+//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ","));
+// b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
+//b) error = SyntaxError: missing ) after argument list
+// (",", ",")); - added , between quoted values
+// c) Identify all the lines that are variable reassignment statements
+//carPrice = Number(carPrice.replaceAll(",", ""));
+//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ","));
+// d) Identify all the lines that are variable declarations
+//let carPrice = "10,000";
+//let priceAfterOneYear = "8,543";
+//const priceDifference = carPrice - priceAfterOneYear;
+//const percentageChange = (priceDifference / carPrice) * 100;
+// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// e) cleans the amount format by removing characters such as , and leaving only number
\ No newline at end of file
diff --git a/Sprint-2a/3-mandatory-interpret/2-time-format.js b/Sprint-2a/3-mandatory-interpret/2-time-format.js
new file mode 100644
index 000000000..a85b69b25
--- /dev/null
+++ b/Sprint-2a/3-mandatory-interpret/2-time-format.js
@@ -0,0 +1,31 @@
+const movieLength = -10; // length of movie in seconds
+
+const remainingSeconds = movieLength % 60;
+const totalMinutes = (movieLength - remainingSeconds) / 60;
+
+const remainingMinutes = totalMinutes % 60;
+const totalHours = (totalMinutes - remainingMinutes) / 60;
+
+const result = `${totalHours}:${remainingMinutes}:${remainingSeconds}`;
+console.log(result);
+
+// For the piece of code above, read the code and then answer the following questions
+
+// a) How many variable declarations are there in this program?
+// 6 variables
+
+// b) How many function calls are there?
+// 2
+// c) Using documentation, explain what the expression movieLength % 60 represents
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+// It means 60 % remainder of Movie length
+
+// d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// totalMinutes is assigned a value of the result from (movieLength - remainingSeconds) / 60;
+
+// e) What do you think the variable result represents? Can you think of a better name for this variable?
+// I think its the total movie length with a timer. Based on research it appears to be template literal variable as it mixes static text with dynamic data. Sorry I don't fully understand this bit yet
+
+// f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+//any number greater than zero returns a valid positive hour, minute or seconds result. Changing the length to 0 returns 0:0:0. Any negative length returns negative values
+
diff --git a/Sprint-2a/3-mandatory-interpret/3-to-pounds.js b/Sprint-2a/3-mandatory-interpret/3-to-pounds.js
new file mode 100644
index 000000000..d69518f17
--- /dev/null
+++ b/Sprint-2a/3-mandatory-interpret/3-to-pounds.js
@@ -0,0 +1,26 @@
+const penceString = "399p";
+
+const penceStringWithoutTrailingP = penceString.substring(
+  0, penceString.length - 1);
+
+const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2);
+
+
+const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+
+console.log(`£${pounds}.${pence}`);
+
+// This program takes a string representing a price in pence
+// The program then builds up a string representing the price in pounds
+
+// You need to do a step-by-step breakdown of each line in this program
+// Try and describe the purpose / rationale behind each step
+
+// To begin, we can start with
+// 1. const penceString = "399p": initialises a string variable with the value "399p"
+// 2. const penceStringWithoutTrailingP = penceString.substring(0): sets penceStringWithoutTRailingP = 399.0 - penceString -1 = 39
+// 3. const paddedPenceNumberString - ensures the figure is 3 characters to taking us back to 399
+// 4 const pounds - removes 2 characters from the amount = 3
+// 5. const pence - adds the amount by 2 characters taking us back to either 39 or 99
+// 6. console displays the figures in pounds and pence = 3.99
\ No newline at end of file
diff --git a/Sprint-2a/4-stretch-explore/chrome.md b/Sprint-2a/4-stretch-explore/chrome.md
new file mode 100644
index 000000000..962580b82
--- /dev/null
+++ b/Sprint-2a/4-stretch-explore/chrome.md
@@ -0,0 +1,15 @@
+Open a new window in Chrome, right click an empty space on the page, select **Inspect** from the dropdown, then locate the **Console** tab.
+
+Voila! You now have access to the [Chrome V8 Engine](https://www.cloudflare.com/en-gb/learning/serverless/glossary/what-is-chrome-v8/).
+Just like the Node REPL, you can input JavaScript code into the Console tab and the V8 engine will execute it.
+
+Let's try an example.
+
+In the Chrome console, invoke the function `alert` with one argument, the string `"Hello world!"`;
+
+What effect does calling the `alert` function have?
+
+Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
+
+What effect does calling the `prompt` function have?
+What is the return value of `prompt`?
diff --git a/Sprint-2a/4-stretch-explore/objects.md b/Sprint-2a/4-stretch-explore/objects.md
new file mode 100644
index 000000000..0216dee56
--- /dev/null
+++ b/Sprint-2a/4-stretch-explore/objects.md
@@ -0,0 +1,16 @@
+## Objects
+
+In this activity, we'll explore some additional concepts that you'll encounter in more depth later on in the course.
+
+Open the Chrome devtools Console, type in `console.log` and then hit enter
+
+What output do you get?
+
+Now enter just `console` in the Console, what output do you get back?
+
+Try also entering `typeof console`
+
+Answer the following questions:
+
+What does `console` store?
+What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
diff --git a/Sprint-2a/README.md b/Sprint-2a/README.md
new file mode 100644
index 000000000..a47afc540
--- /dev/null
+++ b/Sprint-2a/README.md
@@ -0,0 +1,35 @@
+# 🧭 Guide to Sprint 2 exercises
+
+> https://curriculum.codeyourfuture.io/itp/javascript-fundamentals/sprints/2/prep/
+
+> [!TIP]
+> You should always do the prep work _before_ attempting the coursework.
+> The prep shows you _how_ to do the coursework.
+> There is often a step by step video you can code along with too.
+> Do the prep.
+
+This README will guide you through the different sections for this week.
+
+## 1 Exercises
+
+In this section, you'll have a short program and task. Some of the syntax may be unfamiliar - in this case, you'll need to look things up in documentation. 
+
+https://developer.mozilla.org/en-US/docs/Web/JavaScript
+
+## 2 Errors
+
+In this section, you'll need to go to each file in `errors` directory and run the file with node to check what the error is. Your task is to interpret the error message and explain why it occurs. The [errors documentation](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors) will help you figure out the solution.
+
+## 3 Interpret
+
+In these tasks, you have to interpret a slightly larger program with some syntax / operators / functions that may be unfamiliar.
+
+You must use documentation to make sense of anything unfamiliar - learning how to look things up this way is a fundamental part of being a developer!
+
+You can also use `console.log` to check the value of different variables in the code.
+
+https://developer.mozilla.org/en-US/docs/Web/JavaScript 
+
+## 4 Explore - Stretch 💪
+
+This stretch activity will get you to start exploring new concepts and environments by yourself. It will do so by prompting you to reflect on some questions.

From 2ad51f89c7ca8253dce90f4fd3f57548d182f03e Mon Sep 17 00:00:00 2001
From: Carol <cnassuna@gmail.com>
Date: Mon, 21 Sep 2026 20:04:05 +0100
Subject: [PATCH 2/3] renamed branch and pushed files to a previous branch long
 story

---
 Sprint-2/1-key-exercises/1-count.js           |  2 ++
 Sprint-2/1-key-exercises/2-initials.js        |  6 +++++-
 Sprint-2/1-key-exercises/3-paths.js           |  9 +++++++--
 Sprint-2/1-key-exercises/4-random.js          |  6 ++++++
 Sprint-2/2-mandatory-errors/0.js              |  6 ++++--
 Sprint-2/2-mandatory-errors/1.js              |  7 ++++++-
 Sprint-2/2-mandatory-errors/2.js              |  6 +++++-
 Sprint-2/2-mandatory-errors/3.js              |  9 ++++++++-
 Sprint-2/2-mandatory-errors/4.js              |  9 +++++++--
 .../1-percentage-change.js                    | 18 +++++++++++++-----
 .../3-mandatory-interpret/2-time-format.js    | 10 ++++++++--
 Sprint-2/3-mandatory-interpret/3-to-pounds.js | 19 +++++++++----------
 12 files changed, 80 insertions(+), 27 deletions(-)

diff --git a/Sprint-2/1-key-exercises/1-count.js b/Sprint-2/1-key-exercises/1-count.js
index 117bcb2b6..baa67cfba 100644
--- a/Sprint-2/1-key-exercises/1-count.js
+++ b/Sprint-2/1-key-exercises/1-count.js
@@ -4,3 +4,5 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+
+//Answer: The = means assignment. The value of count is 0 but it increments by 1
\ No newline at end of file
diff --git a/Sprint-2/1-key-exercises/2-initials.js b/Sprint-2/1-key-exercises/2-initials.js
index 964c9563c..8da507f7e 100644
--- a/Sprint-2/1-key-exercises/2-initials.js
+++ b/Sprint-2/1-key-exercises/2-initials.js
@@ -1,10 +1,14 @@
 const firstName = "Creola";
 const middleName = "Katherine";
 const lastName = "Johnson";
+// const initial = "initials";
+// const index = 1;
 
+// console.log('The ${Initial} ${index} is ${firstName.charAt(index)}');
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
-const initials = ``;
+const initials = firstName[0] + middleName[0] + lastName[0];
+console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
diff --git a/Sprint-2/1-key-exercises/3-paths.js b/Sprint-2/1-key-exercises/3-paths.js
index ab90ebb28..6becd448d 100644
--- a/Sprint-2/1-key-exercises/3-paths.js
+++ b/Sprint-2/1-key-exercises/3-paths.js
@@ -13,11 +13,16 @@ const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
 const lastSlashIndex = filePath.lastIndexOf("/");
 const base = filePath.slice(lastSlashIndex + 1);
 console.log(`The base part of ${filePath} is ${base}`);
+// console.log('The dir path of ${dir} is ${filePath}.${lastSlashIndex}'); 
+
 
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+const dir = filePath.slice(0, lastSlashIndex);
+const ext = base.slice(base.lastIndexOf("."));
+
+console.log(`The dir part of ${filePath} is ${dir}`);
+console.log(`The ext part of ${base} is ${ext}`);
 
 // https://www.google.com/search?q=slice+mdn
\ No newline at end of file
diff --git a/Sprint-2/1-key-exercises/4-random.js b/Sprint-2/1-key-exercises/4-random.js
index 292f83aab..7ac6f11d6 100644
--- a/Sprint-2/1-key-exercises/4-random.js
+++ b/Sprint-2/1-key-exercises/4-random.js
@@ -2,8 +2,14 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+// (0.68 * 100 ) + 1
+console.log(num)
 
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+// Answer: For calculations i utilised BODMAS formula solving numbers in brackets first, multiplication, subtraction and addition
+// I used 0.68 for math.floor(random number) + 1
+// Sum = 69
diff --git a/Sprint-2/2-mandatory-errors/0.js b/Sprint-2/2-mandatory-errors/0.js
index cf6c5039f..58b5e69c3 100644
--- a/Sprint-2/2-mandatory-errors/0.js
+++ b/Sprint-2/2-mandatory-errors/0.js
@@ -1,2 +1,4 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
\ No newline at end of file
+//This is just an instruction for the first activity - but it is just for human consumption
+// We don't want the computer to run these 2 lines - how can we solve this problem?
+
+// I have commented out the lines. The computer removes commented lines from code compilation
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/1.js b/Sprint-2/2-mandatory-errors/1.js
index 7a43cbea7..58a6230d8 100644
--- a/Sprint-2/2-mandatory-errors/1.js
+++ b/Sprint-2/2-mandatory-errors/1.js
@@ -1,4 +1,9 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+
+console.log(age)
+
+// The TypeError: Assignment to constant variable implies we are trying to reassign the variable twice.
+// This case, I have used let instead in order to allow the variable to be reused.
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/2.js b/Sprint-2/2-mandatory-errors/2.js
index e09b89831..fa92713c9 100644
--- a/Sprint-2/2-mandatory-errors/2.js
+++ b/Sprint-2/2-mandatory-errors/2.js
@@ -1,5 +1,9 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
 
-console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+
+
+// The error is ReferenceError: Cannot access 'cityOfBirth' before initialization
+// Answer: I switched the order by declaring the const first before calling /printing 
diff --git a/Sprint-2/2-mandatory-errors/3.js b/Sprint-2/2-mandatory-errors/3.js
index ec101884d..13addc153 100644
--- a/Sprint-2/2-mandatory-errors/3.js
+++ b/Sprint-2/2-mandatory-errors/3.js
@@ -1,5 +1,7 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(last4Digits)
+
 
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working
@@ -7,3 +9,8 @@ const last4Digits = cardNumber.slice(-4);
 // Then run the code and see what error it gives.
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+//Prediction was the code would run successfully without error although with the wrong results due to absence of syntax errors in the file
+// Error returned: TypeError: cardNumber.slice is not a function
+// Lesson learnt here; slice method is only available for strings or arrays not numbers
+// So converted the cardNumber into a string first
diff --git a/Sprint-2/2-mandatory-errors/4.js b/Sprint-2/2-mandatory-errors/4.js
index 5f86c730b..b9c0d88d3 100644
--- a/Sprint-2/2-mandatory-errors/4.js
+++ b/Sprint-2/2-mandatory-errors/4.js
@@ -1,2 +1,7 @@
-const 12HourClockTime = "8:53pm";
-const 24hourClockTime = "20:53";
+const twelveHourClockTime = "8:53pm";
+const twentyFourHourClockTime = "20:53";
+console.log(twelveHourClockTime);
+console.log(twentyFourHourClockTime);
+
+// Error - SyntaxError: Invalid or unexpected token
+// lesson learnt - variables cannot start with a number
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-interpret/1-percentage-change.js b/Sprint-2/3-mandatory-interpret/1-percentage-change.js
index e24ecb8e1..a173aa8b5 100644
--- a/Sprint-2/3-mandatory-interpret/1-percentage-change.js
+++ b/Sprint-2/3-mandatory-interpret/1-percentage-change.js
@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,19 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
-
+// 2
+//carPrice = Number(carPrice.replaceAll(",", ""));
+//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ","));
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
-
+//b) error = SyntaxError: missing ) after argument list
+// (",", ",")); - added , between quoted values
 // c) Identify all the lines that are variable reassignment statements
-
+//carPrice = Number(carPrice.replaceAll(",", ""));
+//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ","));
 // d) Identify all the lines that are variable declarations
-
+//let carPrice = "10,000";
+//let priceAfterOneYear = "8,543";
+//const priceDifference = carPrice - priceAfterOneYear;
+//const percentageChange = (priceDifference / carPrice) * 100;
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// e) cleans the amount format by removing characters such as , and leaving only number
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-interpret/2-time-format.js b/Sprint-2/3-mandatory-interpret/2-time-format.js
index 47d239558..a85b69b25 100644
--- a/Sprint-2/3-mandatory-interpret/2-time-format.js
+++ b/Sprint-2/3-mandatory-interpret/2-time-format.js
@@ -1,4 +1,4 @@
-const movieLength = 8784; // length of movie in seconds
+const movieLength = -10; // length of movie in seconds
 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
@@ -12,14 +12,20 @@ console.log(result);
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
+// 6 variables
 
 // b) How many function calls are there?
-
+// 2
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+// It means 60 % remainder of Movie length
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// totalMinutes is assigned a value of the result from (movieLength - remainingSeconds) / 60;
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+// I think its the total movie length with a timer. Based on research it appears to be template literal variable as it mixes static text with dynamic data. Sorry I don't fully understand this bit yet
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+//any number greater than zero returns a valid positive hour, minute or seconds result. Changing the length to 0 returns 0:0:0. Any negative length returns negative values
+
diff --git a/Sprint-2/3-mandatory-interpret/3-to-pounds.js b/Sprint-2/3-mandatory-interpret/3-to-pounds.js
index 60c9ace69..d69518f17 100644
--- a/Sprint-2/3-mandatory-interpret/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-interpret/3-to-pounds.js
@@ -1,19 +1,13 @@
 const penceString = "399p";
 
 const penceStringWithoutTrailingP = penceString.substring(
-  0,
-  penceString.length - 1
-);
+  0, penceString.length - 1);
 
 const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
-const pounds = paddedPenceNumberString.substring(
-  0,
-  paddedPenceNumberString.length - 2
-);
+const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2);
 
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
+
+const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
 
 console.log(`£${pounds}.${pence}`);
 
@@ -25,3 +19,8 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+// 2. const penceStringWithoutTrailingP = penceString.substring(0): sets penceStringWithoutTRailingP = 399.0 - penceString -1 = 39
+// 3. const paddedPenceNumberString - ensures the figure is 3 characters to taking us back to 399
+// 4 const pounds - removes 2 characters from the amount = 3
+// 5. const pence - adds the amount by 2 characters taking us back to either 39 or 99
+// 6. console displays the figures in pounds and pence = 3.99
\ No newline at end of file

From 9f92cf322182dea1d06607096b6e5ef4ccda7f16 Mon Sep 17 00:00:00 2001
From: Carol <cnassuna@gmail.com>
Date: Mon, 21 Sep 2026 21:49:44 +0100
Subject: [PATCH 3/3] Deleted sprint 2 old branches, re-added files in
 subfolders and committed changes to all files with my answers

---
 Sprint-2/1-key-exercises/2-initials.js                | 2 ++
 Sprint-2/1-key-exercises/3-paths.js                   | 3 ++-
 Sprint-2/1-key-exercises/4-random.js                  | 1 +
 Sprint-2/2-mandatory-errors/0.js                      | 3 ++-
 Sprint-2/2-mandatory-errors/1.js                      | 3 ++-
 Sprint-2/2-mandatory-errors/3.js                      | 1 +
 Sprint-2/3-mandatory-interpret/1-percentage-change.js | 3 ++-
 Sprint-2/3-mandatory-interpret/2-time-format.js       | 1 +
 Sprint-2/3-mandatory-interpret/3-to-pounds.js         | 3 ++-
 Sprint-2/4-stretch-explore/chrome.md                  | 1 +
 Sprint-2/4-stretch-explore/objects.md                 | 1 +
 Sprint-2/README.md                                    | 1 +
 12 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/Sprint-2/1-key-exercises/2-initials.js b/Sprint-2/1-key-exercises/2-initials.js
index 8da507f7e..8ffb7ed7a 100644
--- a/Sprint-2/1-key-exercises/2-initials.js
+++ b/Sprint-2/1-key-exercises/2-initials.js
@@ -12,3 +12,5 @@ const initials = firstName[0] + middleName[0] + lastName[0];
 console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
+
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/1-key-exercises/3-paths.js b/Sprint-2/1-key-exercises/3-paths.js
index 6becd448d..244114af6 100644
--- a/Sprint-2/1-key-exercises/3-paths.js
+++ b/Sprint-2/1-key-exercises/3-paths.js
@@ -25,4 +25,5 @@ const ext = base.slice(base.lastIndexOf("."));
 console.log(`The dir part of ${filePath} is ${dir}`);
 console.log(`The ext part of ${base} is ${ext}`);
 
-// https://www.google.com/search?q=slice+mdn
\ No newline at end of file
+// https://www.google.com/search?q=slice+mdn
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/1-key-exercises/4-random.js b/Sprint-2/1-key-exercises/4-random.js
index 7ac6f11d6..728951db4 100644
--- a/Sprint-2/1-key-exercises/4-random.js
+++ b/Sprint-2/1-key-exercises/4-random.js
@@ -13,3 +13,4 @@ console.log(num)
 // Answer: For calculations i utilised BODMAS formula solving numbers in brackets first, multiplication, subtraction and addition
 // I used 0.68 for math.floor(random number) + 1
 // Sum = 69
+// CN - added comment to have a clean commit
diff --git a/Sprint-2/2-mandatory-errors/0.js b/Sprint-2/2-mandatory-errors/0.js
index 58b5e69c3..686f4e9db 100644
--- a/Sprint-2/2-mandatory-errors/0.js
+++ b/Sprint-2/2-mandatory-errors/0.js
@@ -1,4 +1,5 @@
 //This is just an instruction for the first activity - but it is just for human consumption
 // We don't want the computer to run these 2 lines - how can we solve this problem?
 
-// I have commented out the lines. The computer removes commented lines from code compilation
\ No newline at end of file
+// I have commented out the lines. The computer removes commented lines from code compilation
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/1.js b/Sprint-2/2-mandatory-errors/1.js
index 58a6230d8..c67081945 100644
--- a/Sprint-2/2-mandatory-errors/1.js
+++ b/Sprint-2/2-mandatory-errors/1.js
@@ -6,4 +6,5 @@ age = age + 1;
 console.log(age)
 
 // The TypeError: Assignment to constant variable implies we are trying to reassign the variable twice.
-// This case, I have used let instead in order to allow the variable to be reused.
\ No newline at end of file
+// This case, I have used let instead in order to allow the variable to be reused.
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-errors/3.js b/Sprint-2/2-mandatory-errors/3.js
index 13addc153..2f9f9550f 100644
--- a/Sprint-2/2-mandatory-errors/3.js
+++ b/Sprint-2/2-mandatory-errors/3.js
@@ -14,3 +14,4 @@ console.log(last4Digits)
 // Error returned: TypeError: cardNumber.slice is not a function
 // Lesson learnt here; slice method is only available for strings or arrays not numbers
 // So converted the cardNumber into a string first
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-interpret/1-percentage-change.js b/Sprint-2/3-mandatory-interpret/1-percentage-change.js
index a173aa8b5..5e410b9be 100644
--- a/Sprint-2/3-mandatory-interpret/1-percentage-change.js
+++ b/Sprint-2/3-mandatory-interpret/1-percentage-change.js
@@ -27,4 +27,5 @@ console.log(`The percentage change is ${percentageChange}`);
 //const priceDifference = carPrice - priceAfterOneYear;
 //const percentageChange = (priceDifference / carPrice) * 100;
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
-// e) cleans the amount format by removing characters such as , and leaving only number
\ No newline at end of file
+// e) cleans the amount format by removing characters such as , and leaving only number
+// CN - added comment to have a clean commit
diff --git a/Sprint-2/3-mandatory-interpret/2-time-format.js b/Sprint-2/3-mandatory-interpret/2-time-format.js
index a85b69b25..3e4fe242e 100644
--- a/Sprint-2/3-mandatory-interpret/2-time-format.js
+++ b/Sprint-2/3-mandatory-interpret/2-time-format.js
@@ -29,3 +29,4 @@ console.log(result);
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
 //any number greater than zero returns a valid positive hour, minute or seconds result. Changing the length to 0 returns 0:0:0. Any negative length returns negative values
 
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-interpret/3-to-pounds.js b/Sprint-2/3-mandatory-interpret/3-to-pounds.js
index d69518f17..0229893c3 100644
--- a/Sprint-2/3-mandatory-interpret/3-to-pounds.js
+++ b/Sprint-2/3-mandatory-interpret/3-to-pounds.js
@@ -23,4 +23,5 @@ console.log(`£${pounds}.${pence}`);
 // 3. const paddedPenceNumberString - ensures the figure is 3 characters to taking us back to 399
 // 4 const pounds - removes 2 characters from the amount = 3
 // 5. const pence - adds the amount by 2 characters taking us back to either 39 or 99
-// 6. console displays the figures in pounds and pence = 3.99
\ No newline at end of file
+// 6. console displays the figures in pounds and pence = 3.99
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/4-stretch-explore/chrome.md b/Sprint-2/4-stretch-explore/chrome.md
index 962580b82..0773d48ec 100644
--- a/Sprint-2/4-stretch-explore/chrome.md
+++ b/Sprint-2/4-stretch-explore/chrome.md
@@ -13,3 +13,4 @@ Now try invoking the function `prompt` with a string input of `"What is your nam
 
 What effect does calling the `prompt` function have?
 What is the return value of `prompt`?
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/4-stretch-explore/objects.md b/Sprint-2/4-stretch-explore/objects.md
index 0216dee56..e540040c2 100644
--- a/Sprint-2/4-stretch-explore/objects.md
+++ b/Sprint-2/4-stretch-explore/objects.md
@@ -14,3 +14,4 @@ Answer the following questions:
 
 What does `console` store?
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+// CN - added comment to have a clean commit
\ No newline at end of file
diff --git a/Sprint-2/README.md b/Sprint-2/README.md
index a47afc540..1967d9e89 100644
--- a/Sprint-2/README.md
+++ b/Sprint-2/README.md
@@ -33,3 +33,4 @@ https://developer.mozilla.org/en-US/docs/Web/JavaScript
 ## 4 Explore - Stretch 💪
 
 This stretch activity will get you to start exploring new concepts and environments by yourself. It will do so by prompting you to reflect on some questions.
+.
\ No newline at end of file