Add inline comments explaining pad and formatTimeDisplay behaviour

Author: HoussamLh

Sprint-2/4-mandatory-interpret/time-format.js

@@ -17,18 +17,22 @@ function formatTimeDisplay(seconds) {
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// ===> 3 times — once for hours, once for minutes, and once for seconds.
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// ===> 0 — the first pad call is for totalHours, which is 0 when input is 61
 
-// c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// c) What is the return value of pad when called for the first time?
+// ===> "00" — because pad(0) returns the string "00"
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// ===> 1 — the last pad call is for remainingSeconds, which is 61 % 60 = 1
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// ===> "01" — because pad(1) turns 1 into "01" using padStart(2, "0")
+
+// Example run:
+console.log(formatTimeDisplay(61)); // Output: "00:01:01"
+