What is the output of this code and how?

Question

Number.prototype.reverse=function(){
let bar = this+"";
let eggs="";
for(let i in bar){
eggs+=bar.charAt(bar.length-i-1)
}
return eggs;
}
var a =32,b=77;
console.log(a.reverse()+b.reverse);

Answer 1

*b.reverse()
Basically you implemented a method to return the reversed of this integer when invoked

But that returned value is a string

Therefore the "+" operator will only concatenate the two values. To add them you need to convert them to an integer

You can use pareInt() for that purpose

var a =32,b=45;
console.log(parseInt(a.reverse()) + parseInt(b.reverse()));