How can i know that a variable is a number or not using a Javascript ?

Question

Is there any way so that i will get to know about my variable is a number or not without using Javascript?

Comments

Looks that you want to know that variable is a number or not using PHP?

Answer 1

I guess he mean to say without using Javascript.

Yes there's a way you will get to know about this:

• bool is_numeric( mixed var)
  Returns TRUE if var is a number or a numeric string, FALSE otherwise.

Or there is another way

• The isNaN() function is used to check if a value is not a number.

Syntax:
isNaN(number)

Parameter Description:
number Required. The value to be tested