Create a Countdown Timer Script

Node.js

Technical Specification

Create a CLI script that counts down from N seconds to 0 and logs each second.

Input/Output Samples

Input:node timer.js 5

Output:5 4 3 2 1 0

Optimal Logic Path

let seconds = Number(process.argv[2] || 5);
const id = setInterval(() => {
  console.log(seconds);
  if (seconds-- <= 0) clearInterval(id);
}, 1000);

Architectural Deep-Dive

We schedule a repeated function every second and stop when the counter hits zero.