From 13ca8bc8d0ccef5297eca0543ca25667306a55b2 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Fri, 12 Jun 2026 07:19:30 +0100
Subject: [PATCH 01/16] adding answer to exercise 1

---
 Sprint-1/1-key-exercises/1-count.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js
index 117bcb2b6e..7661d75c53 100644
--- a/Sprint-1/1-key-exercises/1-count.js
+++ b/Sprint-1/1-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
+
+//Line 3 is a statement. Here we reassign the value of count from 0 to 1 by adding value one to it
\ No newline at end of file

From 50829363e146964dff9937a6744b057e58adeae2 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Fri, 12 Jun 2026 20:51:30 +0100
Subject: [PATCH 02/16] try method use to take first letter

---
 Sprint-1/1-key-exercises/2-initials.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
index 47561f6175..09332e273a 100644
--- a/Sprint-1/1-key-exercises/2-initials.js
+++ b/Sprint-1/1-key-exercises/2-initials.js
@@ -5,7 +5,8 @@ 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 = ``;
+let initials = firstName.charAt(0);
+console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

From 851b51c67345f2e5b6146734f8f820998f1e1907 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Fri, 12 Jun 2026 21:39:58 +0100
Subject: [PATCH 03/16] add the other two initials to the string

---
 Sprint-1/1-key-exercises/2-initials.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js
index 09332e273a..10cc52f0ab 100644
--- a/Sprint-1/1-key-exercises/2-initials.js
+++ b/Sprint-1/1-key-exercises/2-initials.js
@@ -5,7 +5,7 @@ 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 = firstName.charAt(0);
+let initials = firstName.charAt(0)+middleName.charAt(0)+lastName.charAt(0);
 console.log(initials);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn

From ad440937e688d0581ca46fbcb50788f30cb1886c Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sat, 13 Jun 2026 16:03:33 +0100
Subject: [PATCH 04/16] extract dir path from the filepath and print it in
 3paths.js

---
 Sprint-1/1-key-exercises/3-paths.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
index ab90ebb28e..87c522b0aa 100644
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ b/Sprint-1/1-key-exercises/3-paths.js
@@ -15,9 +15,14 @@ const base = filePath.slice(lastSlashIndex + 1);
 console.log(`The base part of ${filePath} is ${base}`);
 
 // Create a variable to store the dir part of the filePath variable
+function dirString(filePath){
+    const dirName = filePath.slice(0,lastSlashIndex);
+    return dirName;
+}
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+const dir = dirString(filePath);
+console.log(dir);
+//const ext = ;
 
 // https://www.google.com/search?q=slice+mdn
\ No newline at end of file

From 8937892eb0ab4b5d28876635077f6ee876236ccd Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sat, 13 Jun 2026 16:21:46 +0100
Subject: [PATCH 05/16] extract the extension type of the filepath and print it

---
 Sprint-1/1-key-exercises/3-paths.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
index 87c522b0aa..3207515849 100644
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ b/Sprint-1/1-key-exercises/3-paths.js
@@ -15,14 +15,22 @@ const base = filePath.slice(lastSlashIndex + 1);
 console.log(`The base part of ${filePath} is ${base}`);
 
 // Create a variable to store the dir part of the filePath variable
-function dirString(filePath){
-    const dirName = filePath.slice(0,lastSlashIndex);
+function dirString(){
+    const dirName = filePath.slice(1,lastSlashIndex);
     return dirName;
 }
+
 // Create a variable to store the ext part of the variable
+function extString(){
+    const lastDotIndex = filePath.lastIndexOf(".");
+    const extName = filePath.slice(lastDotIndex);
+    return extName;
+}
 
 const dir = dirString(filePath);
+const ext = extString(filePath);
 console.log(dir);
+console.log(ext);
 //const ext = ;
 
 // https://www.google.com/search?q=slice+mdn
\ No newline at end of file

From 8948db2cb19e2b1ab45bb4f8046fd2215ad9d4d4 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sat, 13 Jun 2026 16:23:10 +0100
Subject: [PATCH 06/16] remove unnecessary comment line

---
 Sprint-1/1-key-exercises/3-paths.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Sprint-1/1-key-exercises/3-paths.js b/Sprint-1/1-key-exercises/3-paths.js
index 3207515849..1e9adc0328 100644
--- a/Sprint-1/1-key-exercises/3-paths.js
+++ b/Sprint-1/1-key-exercises/3-paths.js
@@ -31,6 +31,5 @@ const dir = dirString(filePath);
 const ext = extString(filePath);
 console.log(dir);
 console.log(ext);
-//const ext = ;
 
 // https://www.google.com/search?q=slice+mdn
\ No newline at end of file

From ff9535b347ede6f6f87d1a3d275252fb062a0bea Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sat, 13 Jun 2026 23:12:18 +0100
Subject: [PATCH 07/16] Declare a variable to store the random number  and
 check if the output is as expected

---
 Sprint-1/1-key-exercises/4-random.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
index 292f83aabb..66ee32ca05 100644
--- a/Sprint-1/1-key-exercises/4-random.js
+++ b/Sprint-1/1-key-exercises/4-random.js
@@ -1,7 +1,9 @@
 const minimum = 1;
 const maximum = 100;
-
-const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+const randomNo = Math.random();
+console.log(randomNo);
+const num = Math.floor(randomNo * (maximum - minimum + 1)) + minimum;
+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

From b27013917df1b1fefd0adcdf3772adf6434b7c72 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sat, 13 Jun 2026 23:48:54 +0100
Subject: [PATCH 08/16] Add comment to explain the break down what num
 represents

---
 Sprint-1/1-key-exercises/4-random.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js
index 66ee32ca05..d8fd5d4bb7 100644
--- a/Sprint-1/1-key-exercises/4-random.js
+++ b/Sprint-1/1-key-exercises/4-random.js
@@ -1,11 +1,18 @@
 const minimum = 1;
 const maximum = 100;
-const randomNo = Math.random();
-console.log(randomNo);
-const num = Math.floor(randomNo * (maximum - minimum + 1)) + minimum;
+const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 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
+
+//In the declaration of num, we can break it down to below:
+
+//1. A randon number, which is with decimals between 0 and 1, is created by method Math.random()
+//2. The random number in step 1 is multipled by 100. That makes an number with decimals.
+//3. The method Math.floor grounded the number in step 2 down to a whole number between 0 - 99.
+//4. The number from step 3 is added 1, so it makes a whole number between 1-100.
+
+//I think the overall javascript code here is to make a random whole number between 1-100.
\ No newline at end of file

From 7131c8ed37bec83e8835431983b3283aa848ffe1 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sat, 20 Jun 2026 08:26:51 +0100
Subject: [PATCH 09/16] finish exercises in 2-mandatory-errors folder

---
 Sprint-1/2-mandatory-errors/0.js | 6 +++++-
 Sprint-1/2-mandatory-errors/1.js | 4 ++++
 Sprint-1/2-mandatory-errors/2.js | 4 ++++
 Sprint-1/2-mandatory-errors/3.js | 6 ++++++
 Sprint-1/2-mandatory-errors/4.js | 4 ++++
 5 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js
index cf6c5039f7..a01fb27746 100644
--- a/Sprint-1/2-mandatory-errors/0.js
+++ b/Sprint-1/2-mandatory-errors/0.js
@@ -1,2 +1,6 @@
 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
+We don't want the computer to run these 2 lines - how can we solve this problem?
+
+//This file has error indicate 'SyntaxError: Unexpected identifier' and some syntax broke the whole file.
+//I can tell that the first 2 lines in this file is not code but some written line which should be commented.
+//So I tried commenting the lines and the error disappeared.
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
index 7a43cbea76..053eafe81b 100644
--- a/Sprint-1/2-mandatory-errors/1.js
+++ b/Sprint-1/2-mandatory-errors/1.js
@@ -2,3 +2,7 @@
 
 const age = 33;
 age = age + 1;
+
+//TypeError: Assignment to constant variable.
+//This error is caused by the wrong reassignment of variable 'age'. It is a constant that cannot be reassigned.
+//So the error prompted when the second line code try to reassign the variable value.
\ No newline at end of file
diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js
index e09b89831d..48e360edba 100644
--- a/Sprint-1/2-mandatory-errors/2.js
+++ b/Sprint-1/2-mandatory-errors/2.js
@@ -3,3 +3,7 @@
 
 console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+
+//ReferenceError: Cannot access 'cityOfBirth' before initialization.
+//This error indicates that the variable 'cityOfBirth' cannot be accessed.
+//It is caused by the wrong order of code. We need to move the declaration of 'cityOfBirth' before the fourth line which calls the variable.
\ 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..0fb705cb80 100644
--- a/Sprint-1/2-mandatory-errors/3.js
+++ b/Sprint-1/2-mandatory-errors/3.js
@@ -7,3 +7,9 @@ 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
+
+//Before running the code, I see .slice() method is applied in this javascript but then I can see this method is used on a number.
+//So I expected an error to tell me this method is applied on wrong elements.
+//When I run it, "TypeError: cardNumber.slice is not a function" which is different to my expectation.
+//I googled it and found this type of error can be triggered by typo or wrong object application and in this case I think it is because the number is wrongly applied.
+//I tried to fix it by adding " " double quotation mark on the number to make it a string and print the last4Digits. I got the last 4 digits successfully.
diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js
index 5f86c730bc..d4d6f886dd 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";
+
+//SyntaxError: Invalid or unexpected token is shown. So I googled and found there are a lot of different cases would trigger this error. I initially thought thar the " " maybe wrongly use as some cases smart quote can confuse developer. I simply replace that with straight quote but the same error shown.
+//Then I tried to comment the first line and saw the same error shown for the second line. There are a double arrow under 12 or 24 in the variable name.
+//So I googled and found the error is due to variable name started with number is not allowed and will trigger error. So I solved the error by removing the number from both variable names.
\ No newline at end of file

From 6f1e6717579164fca989b6b64005905666a49370 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Sun, 21 Jun 2026 11:46:25 +0100
Subject: [PATCH 10/16] Finished the exercises in 3-mandatory-interpret folder

---
 .../3-mandatory-interpret/1-percentage-change.js    |  5 +++++
 Sprint-1/3-mandatory-interpret/2-time-format.js     |  7 +++++++
 Sprint-1/3-mandatory-interpret/3-to-pounds.js       | 13 ++++++++++++-
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
index e24ecb8e18..3f2720746d 100644
--- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js
+++ b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
@@ -12,11 +12,16 @@ 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
+// There is 3 function calls in line 4, 5 and 10. Number() and console.log() both are the function.
 
 // 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?
+// It shows "SyntaxError: missing ) after argument list" point at the end of line 5. I can see there is a missing comma in method .replaceAll() comparing to line method structure. By adding the comma after the ",", the error is solved.
 
 // c) Identify all the lines that are variable reassignment statements
+// Line 4 and 5 are variable reassignment statements.
 
 // d) Identify all the lines that are variable declarations
+// Line 1, 2, 7 and 8 are variable declarations.
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// This expression is removing the comma within the value contains in the variable being called.
\ No newline at end of file
diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js
index 47d2395587..bb382337a8 100644
--- a/Sprint-1/3-mandatory-interpret/2-time-format.js
+++ b/Sprint-1/3-mandatory-interpret/2-time-format.js
@@ -12,14 +12,21 @@ 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?
+// There are 6 variable declarations.
 
 // b) How many function calls are there?
+// Only one, console.log() is the function call.
 
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
+// % is a remainder operation which in this expression trying to calculate the remaining seconds to be shown in the Hour:Minute:Second format.
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// Line 4 is calculating the quotient of the calculation (8784-remainder) divided by 60 to find the movie length in minute. That will be later used to find the display minute in the Hour:Minute:Second format.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+// I think the original movie length is in second and this code is to calculate the display of movie length in the Hour:Minute:Second format like what what we see in a normal movie information.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+//When testing the output with different values of movie length, the output seems right. No matter a 0 value, small or large value, it can display the the Hour:Minute:Second format well. 
+// One thing I have comment on is the display format is not in two digit in each holder of Hour:Minute:Second format. So there is a case 1:5:5 can be displayed which doesn't look user friendly for audience.
diff --git a/Sprint-1/3-mandatory-interpret/3-to-pounds.js b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
index 60c9ace69a..e6bac2736c 100644
--- a/Sprint-1/3-mandatory-interpret/3-to-pounds.js
+++ b/Sprint-1/3-mandatory-interpret/3-to-pounds.js
@@ -1,4 +1,4 @@
-const penceString = "399p";
+const penceString = "1399p";
 
 const penceStringWithoutTrailingP = penceString.substring(
   0,
@@ -25,3 +25,14 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+
+// This program start with a string represents pence which is calculated and displayed in £X.XX in format.
+// Line 3-6 is to remove the character p at the end of the string and store the remaining string in a variable penceStringWithoutTrailingP.
+
+// Line 8-12 is to make sure the string taken in from the previous step has at least 3 characters. If it isn't, fill the start with '0' until it is 3 characters long.
+// Then use this at least 3 characters length string to remove the last 2 characters and store the string as the string of pound.
+
+// Line 14-19 is to make sure the string which is at least 3 characters long to get the last two characters and make sure it is 2 characters long. If it isn't, fill the end with '0' until it 2 characters long. And it is stored as pence.
+
+// Line 18 displayed the string all together to show £x.xx in format.
+// I tested the string works for longer string like 399999p.
\ No newline at end of file

From 38c371d94cb2b490053f222d3b6d663452a2183c Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Mon, 22 Jun 2026 13:44:05 +0100
Subject: [PATCH 11/16] Finished all exercises in 4-stretch-explore folder

---
 Sprint-1/4-stretch-explore/chrome.md  |  9 +++++++++
 Sprint-1/4-stretch-explore/objects.md | 11 +++++++++++
 2 files changed, 20 insertions(+)

diff --git a/Sprint-1/4-stretch-explore/chrome.md b/Sprint-1/4-stretch-explore/chrome.md
index e7dd5feafe..baa79c189b 100644
--- a/Sprint-1/4-stretch-explore/chrome.md
+++ b/Sprint-1/4-stretch-explore/chrome.md
@@ -10,9 +10,18 @@ Let's try an example.
 In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
 
+Answer: A modal window pop up showing Hello World! on it.
+
 What effect does calling the `alert` function have?
 
+Answer: When the modal window pop up, user would see message "Hello World!" and has to click OK on the window.
+
 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?
+
+Answer: A modal window pop up showing a question 'What is your name?' on it and a input field in shown under it for user to insert the name.
+
 What is the return value of `prompt`?
+
+Answer: 'Undefined' is shown in the return value.
diff --git a/Sprint-1/4-stretch-explore/objects.md b/Sprint-1/4-stretch-explore/objects.md
index 0216dee56a..c251ff4400 100644
--- a/Sprint-1/4-stretch-explore/objects.md
+++ b/Sprint-1/4-stretch-explore/objects.md
@@ -6,11 +6,22 @@ Open the Chrome devtools Console, type in `console.log` and then hit enter
 
 What output do you get?
 
+Answer: 'ƒ log() { [native code] }' is shown.
+
 Now enter just `console` in the Console, what output do you get back?
 
+Answer: I got 'console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}'.
+
 Try also entering `typeof console`
 
+Answer: 'object'.
+
 Answer the following questions:
 
 What does `console` store?
+
+Answer: 'Console' stores the varaiables we declared temporarily until we refresh the page.
+
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+
+Both of it has the syntax XXX.XXX at the front is the object and after dot is the method called. So now I know console is the built-in browser object. The dot is the Member Access Operator which make connection or indication between the object and method.

From 7e23fc35fa6b2b1b6e0071e2a6b962818c6e59a6 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Tue, 23 Jun 2026 18:09:59 +0100
Subject: [PATCH 12/16] recorrect 2-mandatory-errors/1.js

---
 Sprint-1/2-mandatory-errors/1.js | 3 ++-
 Sprint-2/1-key-errors/0.js       | 9 ++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js
index 053eafe81b..ca7c2dbb62 100644
--- a/Sprint-1/2-mandatory-errors/1.js
+++ b/Sprint-1/2-mandatory-errors/1.js
@@ -5,4 +5,5 @@ age = age + 1;
 
 //TypeError: Assignment to constant variable.
 //This error is caused by the wrong reassignment of variable 'age'. It is a constant that cannot be reassigned.
-//So the error prompted when the second line code try to reassign the variable value.
\ No newline at end of file
+//So the error prompted when the second line code try to reassign the variable value.
+//In this case, I would use let age instead of const age to assign age and set its value.
\ No newline at end of file
diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 653d6f5a07..6289cc9fbc 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I predict this code will create a function which can capitalise the first letter of a string and keep the second letters to last one the same. This string is stored and return to the function call.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,8 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+// =============> The error message shows "SyntaxError: Identifier 'str' has already been declared". And it indicated the variable name 'str' at line 8, I think it triggered a syntax error when try to declare 'str' in the function while it is already being defined as a function parameter. So I changed it to 'strStored' in the function and it works.
+// =============> function capitalise(str) {
+//  let strStored = `${str[0].toUpperCase()}${str.slice(1)}`;
+//  return strStored;
+//}

From 910726e41fd780b03238d9e105ef28ede270b507 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Tue, 23 Jun 2026 18:17:02 +0100
Subject: [PATCH 13/16] recorrect 3-mandatory-interpret/1-percentage-change.js

---
 Sprint-1/3-mandatory-interpret/1-percentage-change.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
index 3f2720746d..7f80cd1f8f 100644
--- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js
+++ b/Sprint-1/3-mandatory-interpret/1-percentage-change.js
@@ -12,7 +12,8 @@ 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
-// There is 3 function calls in line 4, 5 and 10. Number() and console.log() both are the function.
+// There is 5 function calls in line 4, 5 and 10. Number() and console.log() both are the function.
+// And XXX.replaceAll(",", "") is another function call. So in total there are 5 function calls in this code.
 
 // 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?
 // It shows "SyntaxError: missing ) after argument list" point at the end of line 5. I can see there is a missing comma in method .replaceAll() comparing to line method structure. By adding the comma after the ",", the error is solved.

From f20321b01560a0d70b4fd6228c8c078007ced7eb Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Tue, 23 Jun 2026 18:25:32 +0100
Subject: [PATCH 14/16] recorrect 3-mandatory-interpret/2-time-format.js

---
 Sprint-1/3-mandatory-interpret/2-time-format.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js
index bb382337a8..d16ebd1675 100644
--- a/Sprint-1/3-mandatory-interpret/2-time-format.js
+++ b/Sprint-1/3-mandatory-interpret/2-time-format.js
@@ -25,7 +25,7 @@ console.log(result);
 // Line 4 is calculating the quotient of the calculation (8784-remainder) divided by 60 to find the movie length in minute. That will be later used to find the display minute in the Hour:Minute:Second format.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
-// I think the original movie length is in second and this code is to calculate the display of movie length in the Hour:Minute:Second format like what what we see in a normal movie information.
+// I think the original movie length is in second and this code is to calculate the display of movie length in the Hour:Minute:Second format like what what we see in a normal movie information. I would suggest using durationFormatted as the variable name as it could explain to others clearly what it contains.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
 //When testing the output with different values of movie length, the output seems right. No matter a 0 value, small or large value, it can display the the Hour:Minute:Second format well. 

From 5343b19a8a43cd0708ef55f576f17b15c0aab3d5 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Wed, 24 Jun 2026 07:04:13 +0100
Subject: [PATCH 15/16] Make sure only Sprint 1 files is touched

---
 Sprint-2/1-key-errors/0.js | 9 +++------
 Sprint-2/1-key-errors/1.js | 2 +-
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 6289cc9fbc..2445d911f7 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> I predict this code will create a function which can capitalise the first letter of a string and keep the second letters to last one the same. This string is stored and return to the function call.
+//  =============> write your prediction here
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,8 +9,5 @@ function capitalise(str) {
   return str;
 }
 
-// =============> The error message shows "SyntaxError: Identifier 'str' has already been declared". And it indicated the variable name 'str' at line 8, I think it triggered a syntax error when try to declare 'str' in the function while it is already being defined as a function parameter. So I changed it to 'strStored' in the function and it works.
-// =============> function capitalise(str) {
-//  let strStored = `${str[0].toUpperCase()}${str.slice(1)}`;
-//  return strStored;
-//}
+// =============> write your explanation here
+// =============> write your new code here
\ No newline at end of file
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index f2d56151f4..987186f202 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -17,4 +17,4 @@ console.log(decimalNumber);
 // =============> write your explanation here
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> write your new code here
\ No newline at end of file

From 2c4d7be9f90eb636e26ab259d59d1dc5d441d400 Mon Sep 17 00:00:00 2001
From: lintsang <lintsang.uk@yahoo.com>
Date: Wed, 24 Jun 2026 23:32:22 +0100
Subject: [PATCH 16/16] revert files in sprint 2 folder

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

diff --git a/Sprint-2/1-key-errors/0.js b/Sprint-2/1-key-errors/0.js
index 2445d911f7..653d6f5a07 100644
--- a/Sprint-2/1-key-errors/0.js
+++ b/Sprint-2/1-key-errors/0.js
@@ -10,4 +10,4 @@ function capitalise(str) {
 }
 
 // =============> write your explanation here
-// =============> write your new code here
\ No newline at end of file
+// =============> write your new code here
diff --git a/Sprint-2/1-key-errors/1.js b/Sprint-2/1-key-errors/1.js
index 987186f202..f2d56151f4 100644
--- a/Sprint-2/1-key-errors/1.js
+++ b/Sprint-2/1-key-errors/1.js
@@ -17,4 +17,4 @@ console.log(decimalNumber);
 // =============> write your explanation here
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
\ No newline at end of file
+// =============> write your new code here