Completed section 3

Author: A-Moiz

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
+// 5 functions calls. They are on lines, 4, 5, and 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?
+// There was a comma missing in line 5 in replaceAll("," ""). This was needed because replaceAll is a
+// function that takes two arguments. The missing comma caused a syntax error.
 
 // c) Identify all the lines that are variable reassignment statements
+// Lines 4 and 5 are variable reassignment statements where carPrice and priceAfterOneYear are
+// reassigned new values.
 
 // d) Identify all the lines that are variable declarations
+// Lines 1, 2, 7 and 8 are variable declarations where carPrice and priceAfterOneYear are declared.
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// Number(carPrice.replaceAll(",", "")) removes all commas from the string carPrice and then converts it to a
+// number.

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?
+// 6 variable declarations.
 
 // b) How many function calls are there?
+// 0 function calls.
 
 // 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 returns the remainder left over when movieLength is divided by 60. In this case.
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// The expression on line 4 calculates the length of the movie in minutes.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+// Result represents the movie length formatted as hours:minutes:seconds. A better name could be
+// formattedMovieLength.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// As long as movieLength is a non-negative integer representing seconds, the code will work.

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

@@ -25,3 +25,8 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+// 3. creates a new string by removing the last character ('p') from penceString
+// 8. ensures the pence amount has at least three digits by adding zeros in front if needed
+// 9. takes the first character of the string which represents the pound
+// 14. takes the last two characters of the string which represent the pence
+// 18. outputs the formatted price in pounds and pence to the console