#number plus #number

Question

I would appreciate if somebody tell me why two numbers concatenate (just like two string ) when I want to add them together in functions.
function Add(){
var a=document.getElementById(“id..”).value;
var b=document.getElementById(“id..”).value;
var aB= a+b(ex:5+5);
document.write(aB);}

instead of 10 it gives me 55
Moreover other operators like multiple divisions subtract works well.

Answer 1

Well, this is happening because when the .value method is used, it returns whatever value within the tag specified as a string, which is why the two values concatenate.

To set the variables to integers, you can surround the document.getEle... in a parseInt() function, which takes a string and returns an integer from it.

For example:
var a = parseInt(document.getElementById("ex").value);

Hope this helped!

Answer 2

i think you gonna transform them witch parseInt
when you got prompt, language think that's string