do {} while iteration js code example

Example 1: Iterate with JavaScript While Loops

var ourArray = [];
var i = 0;
while(i < 5) {
  ourArray.push(i);
  i++;
} // 0 to 4 [ 0, 1, 2, 3, 4 ]

var myArray = [];
var i = 5;
while (i  >= 0) {
  myArray.push(i);
  i--;
} // 5 to 0 (reverse) [ 5, 4, 3, 2, 1, 0 ]

Example 2: Iterate with JavaScript Do...While Loops

var ourArray = []; 
var i = 5;
do {
  ourArray.push(i);
  i++;
} while (i < 5); // it will work once and stop looping.