Manchester | May-2026-ITP | Monsur Abdulrahman | Sprint 1 | Coursework Exercises

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,8 @@ 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 updating the value of the variable "count". 
+The "=" operator is an assignment operator, which means it takes "count + 1") 
+and assigns it to the variable on the left side "count". 
+So, it takes the current value of "count", adds 1 to it, 
+and then stores that new value back into "count".

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 = ``;
+let initials = firstName.charAt(0) + middleName.charAt(0) + lastName.charAt(0);
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

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 = filePath.slice(filePath.lastIndexOf(".") + 1);
 
 // https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -4,6 +4,17 @@ const maximum = 100;
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 
 // 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
+
+The expression Math.floor() //rounds a number down to the nearest integer.
+The expression Math.random() //generates a random floating-point number between 0 and 1.
+The expression (maximum - minimum + 1) //calculates the range of numbers between the minimum and maximum values.
+The expression Math.random() * (maximum - minimum + 1) //generates a random floating-point number between 0 and the range of numbers.
+The expression Math.floor(Math.random() * (maximum - minimum + 1)) //rounds that random number down to the nearest integer, resulting in a random integer between 0 and the range of numbers.
+Finally, adding minimum to that result //shifts the range to be between the minimum and maximum values.
 // 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);
+

Sprint-1/2-mandatory-errors/0.js

@@ -1,2 +1,2 @@
-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?
+//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?

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;
+let age = 33;
 age = age + 1;
+console.log(age);

Sprint-1/2-mandatory-errors/2.js

@@ -1,5 +1,8 @@
 // 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}`);
+
+
+

Sprint-1/2-mandatory-errors/3.js

@@ -1,9 +1,21 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+const last4Digits = cardNumber.toString().slice(-4);
 
 // 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
+
+The code didnt work because the slice method was called on an integer (cardNumber), 
+but slice is a method that is only available for strings and arrays. 
+Since cardNumber is an integer, it does not have the slice method, 
+which will result in an error when the code is run.
+
 // Then run the code and see what error it gives.
+The error was: TypeError: cardNumber.slice is not a function
+
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
+It gives this error because the slice method is not meant for numbers. This is what I predicted, as I expected that calling slice on an integer would result in a TypeError.
+
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+const last4Digits = cardNumber.toString().slice(-4);

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,2 @@
-const 12HourClockTime = "8:53pm";
-const 24hourClockTime = "20:53";
+const twelveHourClockTime = "8:53pm";
+const twentyFourHourClockTime = "20:53";

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -12,11 +12,36 @@ 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 4 function calls in this file. 
+The lines where a function call is made are:
+
+1. carPrice.replaceAll(",", "")
+2. Number(carPrice.replaceAll(",", ""))
+3. priceAfterOneYear.replaceAll("," "")
+4. 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?
+the error is coming from the line:
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+
+The error is occurring because there is a missing comma in the replaceAll method. The correct syntax should be:
+
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 // c) Identify all the lines that are variable reassignment statements
+The lines that are variable reassignment statements are:
+1. carPrice = Number(carPrice.replaceAll(",", ""));
+2. priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 // d) Identify all the lines that are variable declarations
+The lines that are variable declarations are:
+1. let carPrice = "10,000";
+2. let priceAfterOneYear = "8,543";
+3. const priceDifference = carPrice - priceAfterOneYear;
+4. const percentageChange = (priceDifference / carPrice) * 100;
+5. console.log(`The percentage change is ${percentageChange}`);
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+The expression Number(carPrice.replaceAll(",", "")) is performing two operations:
+1. It is using the replaceAll method to remove all commas from the string value of carPrice, resulting in a string that represents a number without any formatting (e.g., "10000").
+2. It is then converting that string into a number using the Number() function, so that it can be used in mathematical calculations.

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -12,14 +12,26 @@ 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 in this program. The variables declared are:
+1. movieLength
 
 // b) How many function calls are there?
+There is 1 function call in this program. The function called is:
+1. console.log(result);
 
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
 
+// The expression movieLength % 60 represents the remainder when movieLength is divided by 60. This gives us the number of seconds that are left over after converting the total seconds into minutes.
+
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// The expression assigned to totalMinutes represents the total number of minutes in the movie, excluding the remaining seconds.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+// The variable result represents the formatted time string in the format "hours:minutes:seconds".
+// A better name for this variable could be formattedTime.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+//The code will work for all non-negative integer values of movieLength. 
+//It assumes that the input will always be a valid number of seconds. 
+//If the input is negative or not a number, the results will be unexpected.

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -25,3 +25,22 @@ 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, penceString.length - 1): 
+// creates a new string variable that removes the last character "p" from the original string
+
+// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"): 
+// pads the string with leading zeros to ensure it has at least 3 characters
+
+
+// 4. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2): 
+// extracts the substring representing the pounds by taking all characters except the last two
+
+
+// 5. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0"): 
+// extracts the last two characters representing the pence and pads it with trailing zeros if necessary
+
+
+// 6. console.log(`£${pounds}.${pence}`): outputs the final formatted price in pounds and pence to the console  
+
+

Sprint-1/4-stretch-explore/chrome.md

@@ -15,4 +15,7 @@ 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?
+It pops up an imput requesting my name
+
 What is the return value of `prompt`?
+The text i typed in the prompt

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?
+ƒ log() { [native code] }
 
 Now enter just `console` in the Console, what output do you get back?
+console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
 
 Try also entering `typeof console`
+'object'
 
 Answer the following questions:
 
 What does `console` store?
+It stores a collection of functions and properties related to debugging and logging.
+
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+
+The syntax represents accesing a function stored inside an object.
+The dot "." is an operator in JavaScript used to look inside an object to access its intertnal properties.