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?
// =============> // three times

// 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?
// =============> 61%60=1/61-1/60=1/60%60=0, the value assigned to num when pad called for the first time is 0.

// c) What is the return value of pad is called for the first time?
// =============> write your answer here: "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: remainingSeconds 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 of .padStart(2, "0")
console.log(pad(0));
console.log(pad(1));
console.log(pad(123));
console.log(formatTimeDisplay(61));