How to start and stop/pause setInterval?

Question

I\'m trying to pause and then play a setInterval loop.

After I have stopped the loop, the \"start\" button in my attempt doesn\'t seem to work :

Answer 1

add is a local variable not a global variable try this

var add;
var input = document.getElementById("input");

function start() {
  add = setInterval("input.value++", 1000);
}
start();