From 5b7c4bd3a93458142f7e9c36fa443fa6efc2faec Mon Sep 17 00:00:00 2001 From: Samreen0192 Date: Sun, 12 Jul 2026 23:49:13 +0100 Subject: [PATCH] Complete sprint 1 coursework --- Sprint-1/1-key-exercises/1-count.js | 2 +- Sprint-1/1-key-exercises/2-initials.js | 3 ++- Sprint-1/1-key-exercises/3-paths.js | 4 ++-- Sprint-1/1-key-exercises/4-random.js | 14 ++++++++++---- Sprint-1/2-mandatory-errors/0.js | 6 ++++-- Sprint-1/2-mandatory-errors/1.js | 5 ++++- Sprint-1/2-mandatory-errors/2.js | 5 ++++- Sprint-1/2-mandatory-errors/3.js | 15 ++++++++++++++- Sprint-1/2-mandatory-errors/4.js | 4 ++-- .../1-percentage-change.js | 10 +++++++++- .../3-mandatory-interpret/2-time-format.js | 13 +++++++++++++ Sprint-1/3-mandatory-interpret/3-to-pounds.js | 19 ++++++++++++------- Sprint-1/4-stretch-explore/chrome.md | 7 +++++++ Sprint-1/4-stretch-explore/objects.md | 14 +++++++++++++- 14 files changed, 97 insertions(+), 24 deletions(-) diff --git a/Sprint-1/1-key-exercises/1-count.js b/Sprint-1/1-key-exercises/1-count.js index 117bcb2b6e..38f38830d6 100644 --- a/Sprint-1/1-key-exercises/1-count.js +++ b/Sprint-1/1-key-exercises/1-count.js @@ -3,4 +3,4 @@ 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 +// The = takes the result of count + 1 and saves it back into the count variable, replacing the old value. \ No newline at end of file diff --git a/Sprint-1/1-key-exercises/2-initials.js b/Sprint-1/1-key-exercises/2-initials.js index 47561f6175..5f2f958538 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 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..eabc8523c4 100644 --- a/Sprint-1/1-key-exercises/4-random.js +++ b/Sprint-1/1-key-exercises/4-random.js @@ -3,7 +3,13 @@ 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 -// 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); + + +// num represents a random integer between 1 and 100 (inclusive). + +// 1. Math.random() generates a random decimal in [0, 1) +// 2. (maximum - minimum + 1) = 100, which means Math.random() * 100 gives a decimal in [0, 100) +// 3. Math.floor(...) rounds down to an integer in [0, 99] +// 4. Adding minimum (1) shifts the range to [1, 100] +// Which means num is a random whole number from 1 to 100. diff --git a/Sprint-1/2-mandatory-errors/0.js b/Sprint-1/2-mandatory-errors/0.js index cf6c5039f7..cf3fe7525e 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? + +// Solution is making the instruction to a comment by using two slashes. \ 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..bdd9b5c229 100644 --- a/Sprint-1/2-mandatory-errors/1.js +++ b/Sprint-1/2-mandatory-errors/1.js @@ -1,4 +1,7 @@ // trying to create an age variable and then reassign the value by 1 -const age = 33; +let age = 33; age = age + 1; + +// The error is assignment to constant variable. +// const variables cannot be reassigned. I can fix this by using let instead. \ 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..6cd2c2016d 100644 --- a/Sprint-1/2-mandatory-errors/2.js +++ b/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}`); + +// console.log is meant to be at the bottom \ 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..eeab9dbeb5 100644 --- a/Sprint-1/2-mandatory-errors/3.js +++ b/Sprint-1/2-mandatory-errors/3.js @@ -1,9 +1,22 @@ 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 // Before running the code, make and explain a prediction about why the code won't work + +// I think the code will not work because cardNumber is a number, and .slice() only works with strings. + // Then run the code and see what error it gives. + +//TypeError: cardNumber.slice is not a function + + // Consider: Why does it give this error? Is this what I predicted? If not, what's different? + +// The error happens because slice() cannot be used on a number. It only works on strings. Yes, this is what I predicted because I expected an error caused by trying to use slice() on a number. There is no difference between my prediction and the actual error. + + // Then try updating the expression last4Digits is assigned to, in order to get the correct value diff --git a/Sprint-1/2-mandatory-errors/4.js b/Sprint-1/2-mandatory-errors/4.js index 5f86c730bc..52517b0dc9 100644 --- a/Sprint-1/2-mandatory-errors/4.js +++ b/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"; \ No newline at end of file diff --git a/Sprint-1/3-mandatory-interpret/1-percentage-change.js b/Sprint-1/3-mandatory-interpret/1-percentage-change.js index e24ecb8e18..5c4951fa97 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 +12,19 @@ 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 +//The function call are made five times +//line 4, 5, 10 // 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, A comma was missing between the arguments. Include a comma between the arguments to fix the error. // c) Identify all the lines that are variable reassignment statements +//Lines 7 & 8 + // d) Identify all the lines that are variable declarations +//Lines 1 & 2 + // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression? +//It first removes all commas from the string (e.g. "10,000" becomes "10000"), then converts the resulting string into a number using Number(). This allows the value to be used in mathematical calculations. \ 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..40ab93e683 100644 --- a/Sprint-1/3-mandatory-interpret/2-time-format.js +++ b/Sprint-1/3-mandatory-interpret/2-time-format.js @@ -13,13 +13,26 @@ console.log(result); // a) How many variable declarations are there in this program? +//6 variable declarations + + // b) How many function calls are there? +//One function call - 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 % (remainder) operator returns the remainder after dividing by 60. - 8784 % 60 this returns 24, which is the number of seconds left over after converting to whole minutes. + // d) Interpret line 4, what does the expression assigned to totalMinutes mean? +// It removes the leftover seconds from movieLength and then divides by 60 to calculate the total whole minutes. + // e) What do you think the variable result represents? Can you think of a better name for this variable? +//formattedTime + // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer + +//// No because it only works for whole numbers of seconds, but it won't format the time properly if the minutes or seconds are less than 10. \ 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..92dea24ab2 100644 --- a/Sprint-1/3-mandatory-interpret/3-to-pounds.js +++ b/Sprint-1/3-mandatory-interpret/3-to-pounds.js @@ -1,27 +1,32 @@ const penceString = "399p"; +//It stores the price as a string in pence. + const penceStringWithoutTrailingP = penceString.substring( 0, penceString.length - 1 ); +//Removes the "p" from the end of the string. + const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"); + +//Makes sure the string has at least 3 digits by adding leading zeros if needed. + const pounds = paddedPenceNumberString.substring( 0, paddedPenceNumberString.length - 2 ); +//Takes all the digits except the last two to get the pounds. + const pence = paddedPenceNumberString .substring(paddedPenceNumberString.length - 2) .padEnd(2, "0"); -console.log(`£${pounds}.${pence}`); + // Takes the last two digits to get the pence. -// This program takes a string representing a price in pence -// The program then builds up a string representing the price in pounds +console.log(`£${pounds}.${pence}`); -// You need to do a step-by-step breakdown of each line in this program -// Try and describe the purpose / rationale behind each step +//Combines the pounds and pence into a currency format and prints it. -// To begin, we can start with -// 1. const penceString = "399p": initialises a string variable with the value "399p" diff --git a/Sprint-1/4-stretch-explore/chrome.md b/Sprint-1/4-stretch-explore/chrome.md index e7dd5feafe..988d2c9aa0 100644 --- a/Sprint-1/4-stretch-explore/chrome.md +++ b/Sprint-1/4-stretch-explore/chrome.md @@ -12,7 +12,14 @@ invoke the function `alert` with an input string of `"Hello world!"`; What effect does calling the `alert` function have? +A pop up notification saying Hello World + 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 brings up a input tab to enter an answer + What is the return value of `prompt`? + +Tprompt returns the text that the user enters as a string if cancelled it would return null \ No newline at end of file diff --git a/Sprint-1/4-stretch-explore/objects.md b/Sprint-1/4-stretch-explore/objects.md index 0216dee56a..e8bd00df16 100644 --- a/Sprint-1/4-stretch-explore/objects.md +++ b/Sprint-1/4-stretch-explore/objects.md @@ -6,11 +6,23 @@ Open the Chrome devtools Console, type in `console.log` and then hit enter What output do you get? +undefined/ f log() native code + Now enter just `console` in the Console, what output do you get back? +It shows that console stores an object with many functions inside it. + Try also entering `typeof console` +object + Answer the following questions: -What does `console` store? +What does `console` store + +Console stores an object that contains tools for displaying information in the browser console, for example console.log() this displays messages or console.error() this displays errors. + + What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean? + +The . is called the dot operator, it is used to access properties or methods inside an object. An example is console.log() \ No newline at end of file