Restore Sprint‑1 files to original state

Author: Niangh-Ciang

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

@@ -2,4 +2,5 @@ let count = 0;
 
 count = count + 1;
 
-//Line 3 takes the current value of count, adds 1 to it, and then uses the = operator to assign (store) the new value back into the count variable.
+// 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

Sprint-1/1-key-exercises/2-initials.js

@@ -2,5 +2,10 @@ let firstName = "Creola";
 let middleName = "Katherine";
 let lastName = "Johnson";
 
-let initials = firstName[0] + middleName[0] + lastName[0];
-console.log(initials);
+// 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 = ``;
+
+// https://www.google.com/search?q=get+first+character+of+string+mdn
+

Sprint-1/1-key-exercises/3-paths.js

@@ -17,11 +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 = filePath.slice(0, lastSlashIndex + 1);
+const dir = ;
+const ext = ;
 
-const ext = filePath.slice(filePath.lastIndexOf("."));
-
-console.log(`The dir part of ${filePath} is ${dir}`);
-console.log(`The ext part of ${filePath} is ${ext}`);
-
-// https://www.google.com/search?q=slice+mdn
+// https://www.google.com/search?q=slice+mdn

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

@@ -4,13 +4,6 @@ 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?
-//num is a random whole number between the minimum and maximum values.
-
 // Try breaking down the expression and using documentation to explain what it means
-// Math.random() generates a random number that's greater than or equal to 0 and less than 1
-// Math.floor() rounds a number down to the nearest whole number
-
 // 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);
-//I have run it several times and I saw that the number is changing each time.

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

@@ -1,6 +1,4 @@
 // trying to create an age variable and then reassign the value by 1
 
-let age = 33;
+const age = 33;
 age = age + 1;
-
-console.log(age);

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

@@ -1,7 +1,5 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
 
-const cityOfBirth = "Bolton";
 console.log(`I was born in ${cityOfBirth}`);
-
-//The error is that cityOfBirth is used before it is declared. The console.log runs before the variable exists.
+const cityOfBirth = "Bolton";

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

@@ -1,15 +1,9 @@
-const cardNumber = "4533787178994213";
+const cardNumber = 4533787178994213;
 const last4Digits = cardNumber.slice(-4);
 
-console.log(`The last 4 digits of the card number are ${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
 // 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
-
-//When I ran the code I got: TypeError: cardNumber.slice is not a function
-//I understand this happens because .slice() only works on strings, not numbers
-//To fix this I converted the number into a string so .slice() works

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

@@ -1,9 +1,2 @@
-const TwelveHourClockTime = "8:53pm";
-const TwentyFourHourClockTime = "20:53";
-
-console.log(TwelveHourClockTime);
-console.log(TwentyFourHourClockTime);
-
-// The original code caused an error because variable names cannot start with a number.
-// I fixed the error by renaming the variables so they start with letters instead of numbers.
-//The code runs correctly and prints both time formats.
+const 12HourClockTime = "8:53pm";
+const 24hourClockTime = "20:53";

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;
@@ -12,19 +12,11 @@ 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 3 function calls in this file.
-// They are on lines 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?
-// The error is coming from line 5. This happens because there is a syntax error in the replaceAll function call.
-// I can fix this problem by adding the missing comma between the arguments.
 
 // c) Identify all the lines that are variable reassignment statements
-// The variable reassignment statements are on lines 4 and 5.
 
 // d) Identify all the lines that are variable declarations
-// The variable declarations are on lines 1, 2, 6, and 7.
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
-// The expression first removes all commas from the price string.
-// Then converts the cleaned string into a number so it can be used in calculations.