From 1df05b543747ff100a313d6dc86a0f0e5a9d9f93 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Mon, 15 Jun 2026 13:30:32 +0100
Subject: [PATCH 01/12] Key errors sprint 2  0.js 1-key-errors 0.js have
 spotted

---
 Sprint-2/1-key-errors/0.js | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a07..7a9eb878cf 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,13 +1,25 @@
-// Predict and explain first...
-//  =============> write your prediction here
 
-// call the function capitalise with a string input
-// interpret the error message and figure out why an error is occurring
 
 function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  let str = '${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+It said syntaxError because identifier 'str' has already been declared 
+because we should use backtick`` to wrap the template literal.The first one of the bracket is a
+single quote, not a backtick.
+
+  Also, since str has already been declared as a parameter, we should not use it to define as variable.
+
+
+
+
+
+function capitalise(str) {
+
+  let result = `${str[0].toUpperCase() + str.slice(1)}`;
+  return result;
+}
+
+console.log(capitalise("str"));
+

From 4774028a83063803a1d787c3fad3848cd8886ff2 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Mon, 15 Jun 2026 15:08:59 +0100
Subject: [PATCH 02/12] 1.js logic error insides function

---
 Sprint-2/1-key-errors/1.js | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f4..9c0e5ca561 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -1,10 +1,3 @@
-// Predict and explain first...
-
-// Why will an error occur when this program runs?
-// =============> write your prediction here
-
-// Try playing computer with the example to work out what is going on
-
 function convertToPercentage(decimalNumber) {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
@@ -14,7 +7,19 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+The terminal shows the syntax error because decimal number has been declared.
+because the decimal number is a variable which is not supposed to define in the function, 
+but the decimal number has been defined insides the functon, so it will forever return 50 %.
+  Also, when we call the fucnton, we should name the function convertToPercentage.
+
+
+
+function convertToPercentage(decimalNumber) {
+
+  const percentage = `${decimalNumber * 100}%`;
+
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));
 
-// Finally, correct the code to fix the problem
-// =============> write your new code here

From 7a9559b39ec6421837c1732974ca01e2bec87967 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Mon, 15 Jun 2026 15:23:43 +0100
Subject: [PATCH 03/12] 2.js variable num not defined

---
 Sprint-2/1-key-errors/2.js | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index aad57f7cfe..d52f46729a 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -1,20 +1,22 @@
 
-// Predict and explain first BEFORE you run any code...
 
-// this function should square any number but instead we're going to get an error
-
-// =============> write your prediction of the error here
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
 
-// =============> explain this error message here
+    It shows the syntax error which is an unexpected number;
+    because we should not put 3 insides the variable, because it will lead to variable: num not defined
+insides the function, so the 3 doesn't work insides the function.
+
+We need to put num instead of 3 insides the();
+That way when we call the function by using console.log.The 3 will go into the num variable.
+
 
-// Finally, correct the code to fix the problem
+function square(num) {
+    return num * num;
+}
 
-// =============> write your new code here
 
 

From fedf840a0a3c2106f136b1efc09075fad2205ae1 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Mon, 15 Jun 2026 15:59:06 +0100
Subject: [PATCH 04/12] The variable hasn't been defined yet.

---
 Sprint-2/2-mandatory-debug/0.js | 16 +++++++++++-----
 Sprint-2/2-mandatory-debug/1.js | 18 +++++++++++++-----
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index b27511b417..f59f347333 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,6 +1,8 @@
-// Predict and explain first...
 
-// =============> write your prediction here
+The problem is unexpected identifier "problem"
+The problem is the result doesn't print the mulitplication of the number,
+because we should not call the function inside the function;
+
 
 function multiply(a, b) {
   console.log(a * b);
@@ -8,7 +10,11 @@ function multiply(a, b) {
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+Instead, we should define the expression a * b
+and return the expression.
+
+/ function multiply(a, b) {
+    return (a * b);
+  }
 
-// Finally, correct the code to fix the problem
-//  =============> write your new code here
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
\ No newline at end of file
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 37cedfbcfd..2ca9b6c6cf 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,5 +1,5 @@
-// Predict and explain first...
-//  =============> write your prediction here
+Unexpected identifier "problem"
+variable hasn't been defined so the variable cannot do function.
 
 function sum(a, b) {
   return;
@@ -8,6 +8,14 @@ function sum(a, b) {
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
-// Finally, correct the code to fix the problem
-//  =============> write your new code here
+
+because return should be followed by a + b;
+the final result doesn't return the value. 
+
+
+function sum(a, b) {
+  return;
+  a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

From 93486c9bf2e00b1e9d69b1478a1613531f4593f7 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Mon, 15 Jun 2026 22:23:39 +0100
Subject: [PATCH 05/12] global frame and variable

---
 Sprint-2/2-mandatory-debug/2.js | 37 +++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 11 deletions(-)

diff --git a/Sprint-2/2-mandatory-debug/2.js b/Sprint-2/2-mandatory-debug/2.js
index 57d3f5dc35..2281e71754 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -1,7 +1,12 @@
-// Predict and explain first...
 
-// Predict the output of the following code:
-// =============> Write your prediction here
+The const should not be put into the global frame. 
+if it is set in the global frame,  this will result in a single result:3, 
+no matter which variables you put in later. 
+
+The variable insides should have num to match the function expression. 
+
+
+My prediction of the result will be all in 3.
 
 const num = 103;
 
@@ -13,12 +18,22 @@ console.log(`The last digit of 42 is ${getLastDigit(42)}`);
 console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
-// Now run the code and compare the output to your prediction
-// =============> write the output here
-// Explain why the output is the way it is
-// =============> write your explanation here
-// Finally, correct the code to fix the problem
-// =============> write your new code here
 
-// This program should tell the user the last digit of each number.
-// Explain why getLastDigit is not working properly - correct the problem
+
+yes the output is all in 3, because the reason are above .
+
+
+
+... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
+
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+
+
+After we delete the global frame and put in the variable, we see
+the result now shows three different digit number.
\ No newline at end of file

From 608b21e42e0c8fe89bba724ac0585d9447efd465 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Tue, 16 Jun 2026 16:11:43 +0100
Subject: [PATCH 06/12] define parameter and the  function

---
 Sprint-2/3-mandatory-implement/1-bmi.js   | 27 ++++++++++++-----------
 Sprint-2/3-mandatory-implement/2-cases.js | 10 +++++++++
 2 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 17b1cbde1b..9bc97e2820 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -1,19 +1,20 @@
-// Below are the steps for how BMI is calculated
 
-// The BMI calculation divides an adult's weight in kilograms (kg) by their height in metres (m) squared.
 
-// For example, if you weigh 70kg (around 11 stone) and are 1.73m (around 5 feet 8 inches) tall, you work out your BMI by:
 
-// squaring your height: 1.73 x 1.73 = 2.99
-// dividing 70 by 2.99 = 23.41
-// Your result will be displayed to 1 decimal place, for example 23.4.
+function calculateBMI(weight, height) {
+
+    let newheight = height / 100;
+    let num = weight / (newheight ** 2);
+    let idea = num.toFixed(1);
+
+    return idea;
+}
+
+
+console.log(calculateBMI(58, 178));
+
+
+
 
-// You will need to implement a function that calculates the BMI of someone based off their weight and height
 
-// Given someone's weight in kg and height in metres
-// Then when we call this function with the weight and height
-// It should return their Body Mass Index to 1 decimal place
 
-function calculateBMI(weight, height) {
-    // return the BMI of someone based off their weight and height
-}
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 5b0ef77ad9..7c30f5334f 100644
--- a/Sprint-2/3-mandatory-implement/2-cases.js
+++ b/Sprint-2/3-mandatory-implement/2-cases.js
@@ -4,6 +4,16 @@
 // UPPER_SNAKE_CASE means taking a string and writing it in all caps with underscores instead of spaces.
 
 // Implement a function that:
+function convertToUpperCase(text) {
+const result = text.toUpperCase();
+return result;
+} 
+
+console.log(convertToUpperCase("hello"));
+
+
+
+
 
 // Given a string input like "hello there"
 // When we call this function with the input string

From 321fa4869bc9da38d0bc11de2407a162e6e6f2b6 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Sat, 20 Jun 2026 20:35:32 +0100
Subject: [PATCH 07/12] FIlepath. slice

---
 Sprint-1/1-key-exercises/1-count.js    |  1 +
 Sprint-1/1-key-exercises/2-initials.js | 10 +++++++++-
 Sprint-1/1-key-exercises/3-paths.js    |  6 ++++--
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js
index 117bcb2b6e..1cb53ace08 100644
--- a/Sprint-1/1-key-exercises/1-count.js
+++ b/Sprint-1/1-key-exercises/1-count.js
@@ -1,3 +1,4 @@
+
 let count = 0;
 
 count = count + 1;
diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
index 47561f6175..b8b2e5e974 100644
--- a/Sprint-1/1-key-exercises/2-initials.js
+++ b/Sprint-1/1-key-exercises/2-initials.js
@@ -5,7 +5,15 @@ let lastName = "Johnson";
 // 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.
 
-let initials = ``;
+
+function first(firstName, middleName, lastName){
+
+    let initials = firstName.slice(0,1) + middleName.slice(0,1) + lastName.slice(0,1);
+
+  return `${initials}`;
+}
+console.log(first(firstName, middleName, lastName));
+
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 
diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
index ab90ebb28e..4ae6c9e912 100644
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ b/Sprint-1/1-key-exercises/3-paths.js
@@ -11,13 +11,15 @@
 
 const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
 const lastSlashIndex = filePath.lastIndexOf("/");
+
+// 1. Get the base (file.txt)
 const base = filePath.slice(lastSlashIndex + 1);
 console.log(`The base part of ${filePath} is ${base}`);
 
+const dir =  filePath.slice(0, 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 = ;
 
 // https://www.google.com/search?q=slice+mdn
\ No newline at end of file

From 31950b1d1848fd12ecfb613ecdd8bf8ddd47267e Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Sat, 20 Jun 2026 21:29:06 +0100
Subject: [PATCH 08/12] What does num represent ?

---
 Sprint-1/1-key-exercises/4-random.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
index 292f83aabb..0cb3c7dce2 100644
--- a/Sprint-1/1-key-exercises/4-random.js
+++ b/Sprint-1/1-key-exercises/4-random.js
@@ -3,7 +3,18 @@ const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 
+Math.floor is a function to make sure it is a whole number.
+
+The fuction will randomly choose a decimal number from 0 - 1. 
+After that will do the Math(100-1+1) and multiply the decimal value and add 1.
+
+
+
+
 // 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
+
+
+

From 522d1c32e979c8e9f53548cf2a193032799646d5 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Sat, 20 Jun 2026 23:04:54 +0100
Subject: [PATCH 09/12] function X(num)

---
 Sprint-1/2-mandatory-errors/0.js | 5 +++--
 Sprint-1/2-mandatory-errors/1.js | 7 ++++---
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js
index cf6c5039f7..f2702bcd14 100644
--- a/Sprint-1/2-mandatory-errors/0.js
+++ b/Sprint-1/2-mandatory-errors/0.js
@@ -1,2 +1,3 @@
-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? 
+
diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
index 7a43cbea76..60526e41e2 100644
--- a/Sprint-1/2-mandatory-errors/1.js
+++ b/Sprint-1/2-mandatory-errors/1.js
@@ -1,4 +1,5 @@
 // trying to create an age variable and then reassign the value by 1
-
-const age = 33;
-age = age + 1;
+function X(num){
+const age = num +1; 
+return age;}
+console.log(X(33));

From 7d2dc325995d88921519638d9f469351d4acaeed Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Sat, 20 Jun 2026 23:30:05 +0100
Subject: [PATCH 10/12] .toString

---
 Sprint-1/2-mandatory-errors/2.js |  6 +++---
 Sprint-1/2-mandatory-errors/3.js | 10 +++++++++-
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js
index e09b89831d..1cdbd587a9 100644
--- a/Sprint-1/2-mandatory-errors/2.js
+++ b/Sprint-1/2-mandatory-errors/2.js
@@ -1,5 +1,5 @@
 // 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";
+const cityOfBirth = "BOlton";
+const sentence = `I was born in ${cityOfBirth}`;
+console.log(sentence);
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/3.js b/Sprint-1/2-mandatory-errors/3.js
index ec101884db..01f7180b71 100644
--- a/Sprint-1/2-mandatory-errors/3.js
+++ b/Sprint-1/2-mandatory-errors/3.js
@@ -1,5 +1,13 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+const last4Digits = cardNumber.toString().slice(-4);
+console.log(last4Digits);
+
+because it doesn't have console.log, so it doesn't print the result. 
+but it gives the function errors.
+
+it is not what I expected, because we should change the number into string, because it is not a
+function.
+
 
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working

From b5540b5b30226ec0ddc2b4774f057f4c23957959 Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Sat, 20 Jun 2026 23:47:36 +0100
Subject: [PATCH 11/12] twelvehour, twentyfour

---
 Sprint-1/2-mandatory-errors/4.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js
index 5f86c730bc..06c2f6483b 100644
--- a/Sprint-1/2-mandatory-errors/4.js
+++ b/Sprint-1/2-mandatory-errors/4.js
@@ -1,2 +1,6 @@
-const 12HourClockTime = "8:53pm";
-const 24hourClockTime = "20:53";
+const twelvehourClockTime = "8:53pm";
+const twentyfourhourClockTime = "20:53";
+
+console.log(twelvehourClockTime);
+console.log(twentyfourhourClockTime);
+

From 5e38349cedcdf0c2e0d0583a2c44b58128fd50ca Mon Sep 17 00:00:00 2001
From: Arthur <>
Date: Tue, 30 Jun 2026 10:16:04 +0100
Subject: [PATCH 12/12] clean the accidental Sprint-2

---
 Sprint-2/1-key-errors/0.js                | 26 +++++-----------
 Sprint-2/1-key-errors/1.js                | 25 ++++++---------
 Sprint-2/1-key-errors/2.js                | 18 +++++------
 Sprint-2/2-mandatory-debug/0.js           | 16 +++-------
 Sprint-2/2-mandatory-debug/1.js           | 18 +++--------
 Sprint-2/2-mandatory-debug/2.js           | 37 +++++++----------------
 Sprint-2/3-mandatory-implement/1-bmi.js   | 27 ++++++++---------
 Sprint-2/3-mandatory-implement/2-cases.js | 10 ------
 8 files changed, 59 insertions(+), 118 deletions(-)

diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 7a9eb878cf..653d6f5a07 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,25 +1,13 @@
+// Predict and explain first...
+//  =============> write your prediction here
 
+// call the function capitalise with a string input
+// interpret the error message and figure out why an error is occurring
 
 function capitalise(str) {
-  let str = '${str[0].toUpperCase()}${str.slice(1)}`;
+  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
-It said syntaxError because identifier 'str' has already been declared 
-because we should use backtick`` to wrap the template literal.The first one of the bracket is a
-single quote, not a backtick.
-
-  Also, since str has already been declared as a parameter, we should not use it to define as variable.
-
-
-
-
-
-function capitalise(str) {
-
-  let result = `${str[0].toUpperCase() + str.slice(1)}`;
-  return result;
-}
-
-console.log(capitalise("str"));
-
+// =============> write your explanation here
+// =============> write your new code here
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index 9c0e5ca561..f2d56151f4 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -1,25 +1,20 @@
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
-
-  return percentage;
-}
-
-console.log(decimalNumber);
-
-The terminal shows the syntax error because decimal number has been declared.
-because the decimal number is a variable which is not supposed to define in the function, 
-but the decimal number has been defined insides the functon, so it will forever return 50 %.
-  Also, when we call the fucnton, we should name the function convertToPercentage.
+// Predict and explain first...
 
+// Why will an error occur when this program runs?
+// =============> write your prediction here
 
+// Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
-
+  const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(convertToPercentage(0.5));
+console.log(decimalNumber);
+
+// =============> write your explanation here
 
+// Finally, correct the code to fix the problem
+// =============> write your new code here
diff --git a/Sprint-2/1-key-errors/2.js b/Sprint-2/1-key-errors/2.js
index d52f46729a..aad57f7cfe 100644
--- a/Sprint-2/1-key-errors/2.js
+++ b/Sprint-2/1-key-errors/2.js
@@ -1,22 +1,20 @@
 
+// Predict and explain first BEFORE you run any code...
 
+// this function should square any number but instead we're going to get an error
+
+// =============> write your prediction of the error here
 
 function square(3) {
     return num * num;
 }
 
+// =============> write the error message here
 
-    It shows the syntax error which is an unexpected number;
-    because we should not put 3 insides the variable, because it will lead to variable: num not defined
-insides the function, so the 3 doesn't work insides the function.
-
-We need to put num instead of 3 insides the();
-That way when we call the function by using console.log.The 3 will go into the num variable.
-
+// =============> explain this error message here
 
-function square(num) {
-    return num * num;
-}
+// Finally, correct the code to fix the problem
 
+// =============> write your new code here
 
 
diff --git a/Sprint-2/2-mandatory-debug/0.js b/Sprint-2/2-mandatory-debug/0.js
index f59f347333..b27511b417 100644
--- a/Sprint-2/2-mandatory-debug/0.js
+++ b/Sprint-2/2-mandatory-debug/0.js
@@ -1,8 +1,6 @@
+// Predict and explain first...
 
-The problem is unexpected identifier "problem"
-The problem is the result doesn't print the mulitplication of the number,
-because we should not call the function inside the function;
-
+// =============> write your prediction here
 
 function multiply(a, b) {
   console.log(a * b);
@@ -10,11 +8,7 @@ function multiply(a, b) {
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-Instead, we should define the expression a * b
-and return the expression.
-
-/ function multiply(a, b) {
-    return (a * b);
-  }
+// =============> write your explanation here
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
\ No newline at end of file
+// Finally, correct the code to fix the problem
+//  =============> write your new code here
diff --git a/Sprint-2/2-mandatory-debug/1.js b/Sprint-2/2-mandatory-debug/1.js
index 2ca9b6c6cf..37cedfbcfd 100644
--- a/Sprint-2/2-mandatory-debug/1.js
+++ b/Sprint-2/2-mandatory-debug/1.js
@@ -1,5 +1,5 @@
-Unexpected identifier "problem"
-variable hasn't been defined so the variable cannot do function.
+// Predict and explain first...
+//  =============> write your prediction here
 
 function sum(a, b) {
   return;
@@ -8,14 +8,6 @@ function sum(a, b) {
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-
-because return should be followed by a + b;
-the final result doesn't return the value. 
-
-
-function sum(a, b) {
-  return;
-  a + b;
-}
-
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+// =============> write your explanation here
+// Finally, correct the code to fix the problem
+//  =============> write your new code here
diff --git a/Sprint-2/2-mandatory-debug/2.js b/Sprint-2/2-mandatory-debug/2.js
index 2281e71754..57d3f5dc35 100644
--- a/Sprint-2/2-mandatory-debug/2.js
+++ b/Sprint-2/2-mandatory-debug/2.js
@@ -1,12 +1,7 @@
+// Predict and explain first...
 
-The const should not be put into the global frame. 
-if it is set in the global frame,  this will result in a single result:3, 
-no matter which variables you put in later. 
-
-The variable insides should have num to match the function expression. 
-
-
-My prediction of the result will be all in 3.
+// Predict the output of the following code:
+// =============> Write your prediction here
 
 const num = 103;
 
@@ -18,22 +13,12 @@ console.log(`The last digit of 42 is ${getLastDigit(42)}`);
 console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
+// Now run the code and compare the output to your prediction
+// =============> write the output here
+// Explain why the output is the way it is
+// =============> write your explanation here
+// Finally, correct the code to fix the problem
+// =============> write your new code here
 
-
-yes the output is all in 3, because the reason are above .
-
-
-
-... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
-
-function getLastDigit(num) {
-  return num.toString().slice(-1);
-}
-
-console.log(`The last digit of 42 is ${getLastDigit(42)}`);
-console.log(`The last digit of 105 is ${getLastDigit(105)}`);
-console.log(`The last digit of 806 is ${getLastDigit(806)}`);
-
-
-After we delete the global frame and put in the variable, we see
-the result now shows three different digit number.
\ No newline at end of file
+// This program should tell the user the last digit of each number.
+// Explain why getLastDigit is not working properly - correct the problem
diff --git a/Sprint-2/3-mandatory-implement/1-bmi.js b/Sprint-2/3-mandatory-implement/1-bmi.js
index 9bc97e2820..17b1cbde1b 100644
--- a/Sprint-2/3-mandatory-implement/1-bmi.js
+++ b/Sprint-2/3-mandatory-implement/1-bmi.js
@@ -1,20 +1,19 @@
+// Below are the steps for how BMI is calculated
 
+// The BMI calculation divides an adult's weight in kilograms (kg) by their height in metres (m) squared.
 
+// For example, if you weigh 70kg (around 11 stone) and are 1.73m (around 5 feet 8 inches) tall, you work out your BMI by:
 
-function calculateBMI(weight, height) {
-
-    let newheight = height / 100;
-    let num = weight / (newheight ** 2);
-    let idea = num.toFixed(1);
-
-    return idea;
-}
-
-
-console.log(calculateBMI(58, 178));
-
-
-
+// squaring your height: 1.73 x 1.73 = 2.99
+// dividing 70 by 2.99 = 23.41
+// Your result will be displayed to 1 decimal place, for example 23.4.
 
+// You will need to implement a function that calculates the BMI of someone based off their weight and height
 
+// Given someone's weight in kg and height in metres
+// Then when we call this function with the weight and height
+// It should return their Body Mass Index to 1 decimal place
 
+function calculateBMI(weight, height) {
+    // return the BMI of someone based off their weight and height
+}
\ No newline at end of file
diff --git a/Sprint-2/3-mandatory-implement/2-cases.js b/Sprint-2/3-mandatory-implement/2-cases.js
index 7c30f5334f..5b0ef77ad9 100644
--- a/Sprint-2/3-mandatory-implement/2-cases.js
+++ b/Sprint-2/3-mandatory-implement/2-cases.js
@@ -4,16 +4,6 @@
 // UPPER_SNAKE_CASE means taking a string and writing it in all caps with underscores instead of spaces.
 
 // Implement a function that:
-function convertToUpperCase(text) {
-const result = text.toUpperCase();
-return result;
-} 
-
-console.log(convertToUpperCase("hello"));
-
-
-
-
 
 // Given a string input like "hello there"
 // When we call this function with the input string