time-format.js

function pad(num) {
  return num.toString().padStart(2, "0");
}

function formatTimeDisplay(seconds) {
  const remainingSeconds = seconds % 60;
  const totalMinutes = (seconds - remainingSeconds) / 60;
  const remainingMinutes = totalMinutes % 60;
  const totalHours = (totalMinutes - remainingMinutes) / 60;

  return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
}

// 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
// Pad wil be called 3 times because the return statement uses pad for hours, mintues and 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
// The value is 0 because totalHours is 0 when the input is 61 seconds.

// c) What is the return value of pad is called for the first time?
// =============> write your answer here
// The return value is "00" because padStart makes the number two digits by adding a 0 at the start.

// 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
// The value is 1 because the last call to pad uses remainingSeconds, which is 1 when the input is 61.
// 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
// The return value is "01" because padStart adds a 0 infornt of the single digit number.