Question

32

Determine if JavaScript value is an integer?

rated 0 times [ 37] [ 5] / answers: 1 / hits: 135446 / 12 Years ago, sun, april 22, 2012, 12:00:00

Possible Duplicate:

Check if a variable contains a numerical value in Javascript?

How do I check if variable is an integer in jQuery?

Example:

if (id == int) { // Do this }

Im using the following to get the ID from the URL.

var id = $.getURLParam(id);

But I want to check if the variable is an integer.

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dillionsalvadorg

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3 Years ago

answered 12 Years ago casandra · Accepted Answer

Try this:

if(Math.floor(id) == id && $.isNumeric(id)) 

  alert('yes its an int!');

$.isNumeric(id) checks whether it's numeric or not

Math.floor(id) == id will then determine if it's really in integer value and not a float. If it's a float parsing it to int will give a different result than the original value. If it's int both will be the same.