Do you know how to swap two variable data? I know you did try it many times! Wait how I know? Because you are I, and I am you!!!

swap

var abul = 100;
var babul = 99;
console.log("Before swap abul = ", abul, "babul = ", babul);

var temp = abul; //The temp value is now abul's value 100.
abul = babul // now abul has babul's value 99.
babul = temp //because temp has babul's value 100.

console.log("After swap abul = ", abul, "babul = ",babul);