3-mandatory-interpret are done.

Author: B3-Bisrat

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 +12,18 @@ 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 5 function calls. In the fourth line Number () and replaceAll ().
+// In the fifth line same as line 4 Number () and replaceAll ().
+// Last one in seventh line 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?
+// The error is in line 5. The error is occurring because there is a missing comma in the replaceAll function. The correct code should be: priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 // c) Identify all the lines that are variable reassignment statements
+// Line 4 and line 5 are variable reassignment statements. In line 4, carPrice is being reassigned with the new value after removing the comma and converting it to a number. In line 5, priceAfterOneYear is being reassigned in the same way.
 
 // d) Identify all the lines that are variable declarations
+// Line 1 and line 2 are variable declarations. In line 1, carPrice is declared and initialized with the string value "10,000". In line 2, priceAfterOneYear is declared and initialized with the string value "8,543".
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// The expression removes the comma from the price string and converts it into a number. This allows JavaScript to use the value in calculations.

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

@@ -12,14 +12,22 @@ 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: movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, and result.
 
 // b) How many function calls are there?
+// There is 1 function call in this program: 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 % operator is the remainder operator.
+// It returns the remainder left over after one number is divided by another number.
+// MovieLength % 60 finds the remaining seconds after dividing the total movie length by 60.
+// This is used to calculate how many seconds are left after converting the total seconds into minutes.
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
+// Take away the leftover seconds, then convert the rest into minutes.
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
-
+// The movie length displayed as hours:minutes:seconds.
+// A better name for this variable could be movieDuration.
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// Yes, it works for all movie lengths except for negative and text values.

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

@@ -25,3 +25,18 @@ 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):
+// removes the last character ("p") from the string, leaving only the number part "399".
+
+// 3. const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0"):
+// makes sure the pence value has at least 3 characters by adding zeros at the start if needed.
+
+// 4. const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2):
+// takes the first part of the string to get the pounds value.
+
+// 5. const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0"):
+// takes the last two characters to get the pence value and adds a zero at the end if needed.
+
+// 6. console.log(`£${pounds}.${pence}`):
+// prints the final price in pounds and pence format.