From faf3625ce64db7d607c59520c748fb4fb14e2000 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 12:48:12 +0100 Subject: [PATCH 01/14] Created a new branch and worked on 1-count --- Sprint-1/1-key-exercises/1-count.js | 1 + 1 file changed, 1 insertion(+) diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js index 117bcb2b6e..5d72c39ede 100644 --- a/Sprint-1/1-key-exercises/1-count.js +++ b/Sprint-1/1-key-exercises/1-count.js @@ -4,3 +4,4 @@ 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 +// Here, line 3 is a statement that is reassigning a value to count by incrementing it by 1. From c42325d7da890937c7fb55811a5a9c63e635c2aa Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 12:51:30 +0100 Subject: [PATCH 02/14] worked on 2-initials --- 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..737e39bd73 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[0] + middleName[0] + lastName[0]; +console.log(initials); // https://www.google.com/search?q=get+first+character+of+string+mdn From c73573c10f5ba43b5d7ad9fb084115f0b7035bf9 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 13:51:45 +0100 Subject: [PATCH 03/14] Worked on 3 and 4 --- Sprint-1/1-key-exercises/3-paths.js | 4 ++-- Sprint-1/1-key-exercises/4-random.js | 6 ++++++ 2 files changed, 8 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..98ab371c3f 100644 --- a/Sprint-1/1-key-exercises/3-paths.js +++ b/Sprint-1/1-key-exercises/3-paths.js @@ -17,7 +17,7 @@ console.log(`The base part of ${filePath} is ${base}`); // 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(".")); // https://www.google.com/search?q=slice+mdn \ No newline at end of file diff --git a/Sprint-1/1-key-exercises/4-random.js b/Sprint-1/1-key-exercises/4-random.js index 292f83aabb..b31aa4fae2 100644 --- a/Sprint-1/1-key-exercises/4-random.js +++ b/Sprint-1/1-key-exercises/4-random.js @@ -7,3 +7,9 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum; // 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 + +console.log(num); + +// Here, Math.random creates a random number between 0 to 1 and Math.floor rounds down to the nearest integer. +// After creating a random number between 0 and 1, we will multiply it by the result of (100 - 1 + 1), then round it down to the nearest integer +// Then add all of that to 1 which is the minimum number. From 17cbf5533bded8c8d5e9269457b51495088f7d86 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 13:55:29 +0100 Subject: [PATCH 04/14] worked on mandatory errors 0 and 1 --- Sprint-1/2-mandatory-errors/0.js | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js index cf6c5039f7..16b2102d2a 100644 --- a/Sprint-1/2-mandatory-errors/0.js +++ b/Sprint-1/2-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? + +// We use two forward slashes to comment things we do not want the computer to read. It is for human reading only. \ No newline at end of file From 9c28ca435bd7420caf0ca39985b85103fc570751 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 13:55:50 +0100 Subject: [PATCH 05/14] Mandatory error 1 --- Sprint-1/2-mandatory-errors/1.js | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Sprint-1/2-mandatory-errors/1.js b/Sprint-1/2-mandatory-errors/1.js index 7a43cbea76..bd44b9c657 100644 --- a/Sprint-1/2-mandatory-errors/1.js +++ b/Sprint-1/2-mandatory-errors/1.js @@ -1,4 +1,6 @@ // trying to create an age variable and then reassign the value by 1 -const age = 33; +let age = 33; age = age + 1; + +// we can reassign values when using the "let" in declaring variables. From f6f2aaf6a400faf1c977cd31fdf379739da1b973 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 14:00:26 +0100 Subject: [PATCH 06/14] Mandatory errors 2 and 3 --- Sprint-1/2-mandatory-errors/2.js | 6 +++++- Sprint-1/2-mandatory-errors/3.js | 8 +++++++- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/Sprint-1/2-mandatory-errors/2.js b/Sprint-1/2-mandatory-errors/2.js index e09b89831d..d6bac40bc7 100644 --- a/Sprint-1/2-mandatory-errors/2.js +++ b/Sprint-1/2-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 variable 'cityOfBirth' had to be declared first before doing the console log. +// This is because the Javascript reads from top to bottom diff --git a/Sprint-1/2-mandatory-errors/3.js b/Sprint-1/2-mandatory-errors/3.js index ec101884db..56ac1daf0c 100644 --- a/Sprint-1/2-mandatory-errors/3.js +++ b/Sprint-1/2-mandatory-errors/3.js @@ -1,5 +1,7 @@ const cardNumber = 4533787178994213; -const last4Digits = cardNumber.slice(-4); +const last4Digits = String(cardNumber).slice(-4); + +console.log(last4Digits); // The last4Digits variable should store the last 4 digits of cardNumber // However, the code isn't working @@ -7,3 +9,7 @@ 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: The slice method doesn't work on numbers and integers. It only works on strings and arrays +//Error message: The error message states that "Slice is not a function" +//Change the numbers (integer) to String From 464f1eacb703d63017ebbc47a694026435654364 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 14:04:10 +0100 Subject: [PATCH 07/14] MAndatory error 4 --- Sprint-1/2-mandatory-errors/4.js | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js index 5f86c730bc..0d6bb328af 100644 --- a/Sprint-1/2-mandatory-errors/4.js +++ b/Sprint-1/2-mandatory-errors/4.js @@ -1,2 +1,5 @@ -const 12HourClockTime = "8:53pm"; -const 24hourClockTime = "20:53"; +const HourClockTime = "8:53pm"; +const hourClockTime = "20:53"; + +console.log(HourClockTime, hourClockTime); +// When declaring variables, we do not use numbers to name the variable. From 5776aa56671cc4162868142090cf69cc9274c3b4 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 14:28:06 +0100 Subject: [PATCH 08/14] Worked on mandatory interpreting 1, 2 and 3 --- Sprint-1/3-mandatory-interpret/1-percentage-change.js | 7 ++++++- Sprint-1/3-mandatory-interpret/2-time-format.js | 6 ++++++ Sprint-1/3-mandatory-interpret/3-to-pounds.js | 6 ++++++ 3 files changed, 18 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..9266c0a5f3 100644 --- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js +++ b/Sprint-1/3-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 +12,16 @@ 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 are two function calls here. replaceAll and console.log // 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? +//Line 5 was missing a separation comma. // c) Identify all the lines that are variable reassignment statements +// Line 4 and Line 5 have variables being reassigned. // d) Identify all the lines that are variable declarations +//Line 1, line 2, line 7 and line 8 have variable declarations // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression? +//This expression removes the comma in the price from 10,000 to 10000 diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js index 47d2395587..b540ab2284 100644 --- a/Sprint-1/3-mandatory-interpret/2-time-format.js +++ b/Sprint-1/3-mandatory-interpret/2-time-format.js @@ -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? +// There are 6 variable declarations // b) How many function calls are there? +// There is one function call which is console.log // 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 operator which will do movieLength / 60. This will give us the remainder which we will consider the remainder of this operation // d) Interpret line 4, what does the expression assigned to totalMinutes mean? +// In line 4 we are declaring the totalMinutes. we have the remainingSeconds which is 24. Then we will do ((8784 - 24) /60) = 146 // e) What do you think the variable result represents? Can you think of a better name for this variable? +// The variable result shows the total remaining duration of a movie in terms of hours, minutes and seconds. We can also call it remainingTime. // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer +// The movieLength code will work work with all kinds of number. That is integers and floats. It will not work with strings \ No newline at end of file diff --git a/Sprint-1/3-mandatory-interpret/3-to-pounds.js b/Sprint-1/3-mandatory-interpret/3-to-pounds.js index 60c9ace69a..c2bdcc5811 100644 --- a/Sprint-1/3-mandatory-interpret/3-to-pounds.js +++ b/Sprint-1/3-mandatory-interpret/3-to-pounds.js @@ -25,3 +25,9 @@ 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 = "399p".substring( 0, penceString.length - 1): Here we use the subString method which will slide the string of +// penceString starting at index 0 and ending at index 2 (3 - 1). The result should be "399" +// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"): Here we want to make sure that the penceStringWithoutTrailingP variable has at least 3 characters, if that is not the case, we will add "0" infront of the character till it reaches the length required. +// Here, paddedPenceNumberString = "399" . Then pounds = "3" +// 4. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0") : The substring(paddedPenceNumberString.length - 2) will return 99 and the padEnd(2,"0") will make sure that there are at least two characters here. + From 00fc139e5ecac7ddbe896c3356403f70bb63a8bb Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 14:29:49 +0100 Subject: [PATCH 09/14] changes on chron stretch commits --- Sprint-1/4-stretch-explore/chrome.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Sprint-1/4-stretch-explore/chrome.md b/Sprint-1/4-stretch-explore/chrome.md index e7dd5feafe..23e5c4182c 100644 --- a/Sprint-1/4-stretch-explore/chrome.md +++ b/Sprint-1/4-stretch-explore/chrome.md @@ -11,8 +11,11 @@ In the Chrome console, invoke the function `alert` with an input string of `"Hello world!"`; What effect does calling the `alert` function have? +Answer: It creates a pop up window on the browser. 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: It creates a pop up window which allows the user to input data. This prompt has a cancel and an 'OK' button. What is the return value of `prompt`? +Answer: The return value will depend on what the user inputs. If the user presses the 'cancel' button, then the return is null. If the user presses 'OK' without entering anything, then the return type is an empty string. Else if something is written by the user, then the return value will be what the user has entered. From c590ae8be1f47e816146530cd250be6cac693070 Mon Sep 17 00:00:00 2001 From: christelleb Date: Wed, 15 Jul 2026 14:32:11 +0100 Subject: [PATCH 10/14] objects --- Sprint-1/4-stretch-explore/objects.md | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/Sprint-1/4-stretch-explore/objects.md b/Sprint-1/4-stretch-explore/objects.md index 0216dee56a..3465edfe93 100644 --- a/Sprint-1/4-stretch-explore/objects.md +++ b/Sprint-1/4-stretch-explore/objects.md @@ -5,12 +5,20 @@ In this activity, we'll explore some additional concepts that you'll encounter i Open the Chrome devtools Console, type in `console.log` and then hit enter What output do you get? +Answer: I get this ƒ log() { [native code] } Now enter just `console` in the Console, what output do you get back? +Answer: {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 a lot of objects like assert, clear, error, info, warn, log, debug and more. + What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean? +Answer: Console.log helps to print out a message. +Console.assert writes an error message to the console if the assertion is false. If the assertion is true, nothing happens. +`.` is used to access the properties or methods of an object From ac3cfefbc459a9afcc2eeac72ebabcbf4f8bf306 Mon Sep 17 00:00:00 2001 From: christelleb Date: Fri, 17 Jul 2026 10:32:57 +0100 Subject: [PATCH 11/14] Updates on the key exercise of random numbers --- 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 b31aa4fae2..655ad6dd41 100644 --- a/Sprint-1/1-key-exercises/4-random.js +++ b/Sprint-1/1-key-exercises/4-random.js @@ -10,6 +10,8 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum; console.log(num); -// Here, Math.random creates a random number between 0 to 1 and Math.floor rounds down to the nearest integer. -// After creating a random number between 0 and 1, we will multiply it by the result of (100 - 1 + 1), then round it down to the nearest integer +// Here, Math.random creates a random decimal number greater than or equals to 0 and less than 1. It can be any decimal number in between. +// The function Math.floor rounds down any decimal number to the nearest integer to give it a whole number. +//In Javascript, the the expression in the bracket is read first. Here, we started by doing (maximum - minimum + 1) which is (100 - 1 + 1). The answer is 100. +// The next evaluation is creating a random number by reading the function Math.random(0<= random number < 1), we will multiply it by the result of (100 - 1 + 1 which is 100), then round it down to the nearest integer // Then add all of that to 1 which is the minimum number. From 293350c15f68e1d7f6edebce1c15f3ec768a1af5 Mon Sep 17 00:00:00 2001 From: christelleb Date: Fri, 17 Jul 2026 10:41:51 +0100 Subject: [PATCH 12/14] Updates on mandatory interpretation --- Sprint-1/3-mandatory-interpret/1-percentage-change.js | 4 +++- 1 file changed, 3 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 9266c0a5f3..f677c4741c 100644 --- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js +++ b/Sprint-1/3-mandatory-interpret/1-percentage-change.js @@ -12,7 +12,9 @@ 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 are two function calls here. replaceAll and console.log +//There are three function calls here. "replaceAll" which replaces every "," with an empty space, therefore removing the comma. +// We equally have console.log which prints out. +//The last function is Number() which changes everything in it into a number/integer. Here, it changes String to numbers. // 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? //Line 5 was missing a separation comma. From 744b0a7802a3c1d37de2d77dc39927cf558d6624 Mon Sep 17 00:00:00 2001 From: christelleb Date: Fri, 17 Jul 2026 10:51:14 +0100 Subject: [PATCH 13/14] more changes on percentage change --- Sprint-1/3-mandatory-interpret/1-percentage-change.js | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js index f677c4741c..e2ba63a934 100644 --- a/Sprint-1/3-mandatory-interpret/1-percentage-change.js +++ b/Sprint-1/3-mandatory-interpret/1-percentage-change.js @@ -24,6 +24,9 @@ console.log(`The percentage change is ${percentageChange}`); // d) Identify all the lines that are variable declarations //Line 1, line 2, line 7 and line 8 have variable declarations +// Here, we have declared variables by using let and const. We have variable called carPrice, priceAfterOneYear, priceDifference and percentageChange. +// We have given values to these variables as well which can be seen after the equals sign. // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression? //This expression removes the comma in the price from 10,000 to 10000 +//Here, every time the function reads a comma (","), it replaces the comma with "" which is basically an empty space. In other words, it removes the comma in a expression From 64e56f7f14735a90e1c3c08679b99701f86deae6 Mon Sep 17 00:00:00 2001 From: christelleb Date: Fri, 17 Jul 2026 11:08:05 +0100 Subject: [PATCH 14/14] Updates on time format to answer question --- Sprint-1/3-mandatory-interpret/2-time-format.js | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Sprint-1/3-mandatory-interpret/2-time-format.js b/Sprint-1/3-mandatory-interpret/2-time-format.js index b540ab2284..034ad6fd3d 100644 --- a/Sprint-1/3-mandatory-interpret/2-time-format.js +++ b/Sprint-1/3-mandatory-interpret/2-time-format.js @@ -1,4 +1,4 @@ -const movieLength = 8784; // length of movie in seconds +const movieLength = 8784 // length of movie in seconds const remainingSeconds = movieLength % 60; const totalMinutes = (movieLength - remainingSeconds) / 60; @@ -28,4 +28,7 @@ console.log(result); // The variable result shows the total remaining duration of a movie in terms of hours, minutes and seconds. We can also call it remainingTime. // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer -// The movieLength code will work work with all kinds of number. That is integers and floats. It will not work with strings \ No newline at end of file +// When using -8784, I had the same answers with 8784, except they were all negative numbers. -2:-26:-24 +// When using 87.84, I had 0:1:27.840000000000003 which is still a readable time. But it doesn't round up the decimal numbers. +// When using the String "8784", I had 2:26:24 which is the same answer as when I used 8784. Javascript is converts strings to integers automatically when subtracting +// When using the string "hello", I get the outcome NaN:NaN:NaN which means "Not a Number". the string hello can't work in divisions. \ No newline at end of file