while Loops in JavaScript

 //while loop

let n = prompt("Enter the value of a : ");

n = Number.parseInt(n);

let i = 0;

while (i < n) {

    console.log(i);

    i++;

}

//do while loop

let n2 = prompt("Enter the value of b : ");

let i2 = 0;

do {

    console.log(i2);

    i2++;

} while (i2 < n2);