Convert Days to Seconds in JavaScript (Exercise)

The challenge

Write secondsIn(days) that returns how many seconds there are in that many days. (A day has 24 hours, an hour has 60 minutes, and a minute has 60 seconds.)

Example

secondsIn(1)  // 86400

Try it

Write your answer below, then press Check my answer. Your code runs right here in your browser, and the tests tell you what works.

Your solution

It prints

What the tests check

secondsIn(1) gives 86400
secondsIn(7) gives 604800
secondsIn(0) gives 0

Hints

Stuck? Open one hint at a time. Try again after each one.

Hint 1

Multiply days × 24 × 60 × 60.

Hint 2

Using constants like const HOURS_PER_DAY = 24; makes it easier to read.

A solution

There’s always more than one right way. Read it, make sure you understand it, then try writing it yourself without looking.

Show one possible solution

Solution

function secondsIn(days) {
  const HOURS = 24;
  const MINUTES = 60;
  const SECONDS = 60;
  return days * HOURS * MINUTES * SECONDS;
}

Learn what you need

This exercise uses what Grade 1: Variables: Boxes With Labels teaches. Read those notes first if any of it is new.

Convert days to seconds