How to check if a JavaScript number is a real, valid number?

Question

MY code is:

function isNumber(n){
return typeof n == \'number\' && !isNaN(n);
}

window.onload=function(){
var a=0,b=1,c=2.2,d=-3,e=-4.4,f=10/3;
var          


        

Answer 1

I use combination of parse and check for numbers.. as outlined below

function isNumber(inputValue){ return ((parseFloat(inputValue) ==0 || parseFloat(inputValue)) && !isNaN(inputValue)); };

hope this helps