Update 2-time-format.js

Add detailed comments answering questions about movie length time calculation.

Author: HoussamLh

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

@@ -9,17 +9,36 @@ const totalHours = (totalMinutes - remainingMinutes) / 60;
 const result = `${totalHours}:${remainingMinutes}:${remainingSeconds}`;
 console.log(result);
 
-// For the piece of code above, read the code and then answer the following questions
+// --- Answers to the questions ---
 
 // a) How many variable declarations are there in this program?
+// There are 6 variable declarations:
+// movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, and result
 
 // b) How many function calls are there?
+// There is 1 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 `%` operator is the modulo operator, which returns the remainder after division.
+// So movieLength % 60 gives the remainder when movieLength is divided by 60.
+// This means it calculates the leftover seconds after counting full minutes.
 
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
+// Line 4: (movieLength - remainingSeconds) / 60
+// This subtracts the leftover seconds from the total seconds,
+// giving a multiple of 60 seconds (full minutes),
+// then divides by 60 to convert seconds to total minutes.
 
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
+// result holds the formatted string showing the movie length in "hours:minutes:seconds" format.
+// A better name might be `formattedTime` or `movieDurationFormatted`.
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// For positive integers, the code works correctly.
+// For zero, it returns "0:0:0", which is fine.
+// For negative numbers, the calculation may produce unexpected negative values.
+// For very large values, it still works fine.
+// The code assumes movieLength is an integer number of seconds.
+// If movieLength is a non-integer or not a number, the code might not behave as expected.
+