Add explanations for time formatting exercise in time-format.js

Author: SandzSoft

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

@@ -15,24 +15,62 @@ function formatTimeDisplay(seconds) {
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
 
+console.log(formatTimeDisplay(61));
+
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
 
+//---------------------------------------------------------------------------------------------
+
 // Questions
 
+//---------------------------------------------------------------------------------------------
+
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// 3 times.
+// pad(totalHours)
+// pad(remainingMinutes)
+// pad(remainingSeconds)
+
+//---------------------------------------------------------------------------------------------
 
 // 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
+// remainingSeconds = 61 % 60 = 1
+// totalMinutes = (61 - 1) / 60 = 1
+// remainingMinutes = 1 % 60 = 1
+// totalHours = (1 - 1) / 60 = 0
+// First call: pad(totalHours)
+// So, num = 0.
+
+//---------------------------------------------------------------------------------------------
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// "00"
+// num = 0
+// numString = "0"
+// Since numString.length is 1, the while loop runs once.
+// "0" + "0" = "00"
+// The function returns "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 call to pad is pad(remainingSeconds).
+// When seconds is 61, remainingSeconds is 61 % 60, which equals 1.
+// Therefore, num is assigned the value 1.
+
+//---------------------------------------------------------------------------------------------
 
 // e) What is the return value of pad when it is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// "01"
+// The last call is pad(1).
+// Inside the function, 1 is converted to the string "1".
+// Since its length is less than 2, a leading zero is added,
+// making it "01".
+// The function then returns "01".