How do I check that a number is float or integer?

Question

How to find that a number is float or integer?

1.25 --> float  
1 --> integer  
0 --> integer  
0.25 --> float
<         


        

Answer 1

You can use a simple regular expression:

function isInt(value) {

    var er = /^-?[0-9]+$/;

    return er.test(value);
}

Or you can use the below functions too, according your needs. They are developed by the PHPJS Project.

is_int() => Check if variable type is integer and if its content is integer

is_float() => Check if variable type is float and if its content is float

ctype_digit() => Check if variable type is string and if its content has only decimal digits

Update 1

Now it checks negative numbers too, thanks for @ChrisBartley comment!