javascript (+) sign concatenates instead of giving sum?

Question

I created a simple program that make the sum of two numbers BUT.. the program is concatenating instead, This is so confusing! Can anyone help?

Answer 1

Who are using javascript in salesforce make sure

var a= 8 ;
var b =8 ;
var c = a+b;

This will give u result output = 88; It is will just concatenate. If you want to add those two: You should write logic as :

var a = 8;
var b = 8
var c = parseInt(a)+ parseInt(b);

This will give you the desired result of 16 , The same is the case with multiplication.

Hope this helps.