JavaScript isInteger() Method

　JavaScript Number Object

isInteger()The method determines whether the passed value is an integer.

If the passed parameter is an integer, it returns true; otherwise, it returns false.

If the passed parameter is NaN or infinite, it returns false.

Syntax:

Number.isInteger(value)

Number.isInteger(0);　//　true
Number.isInteger(1);　//　true
Number.isInteger(20);//　true
Number.isInteger(25);//　true
Number.isInteger(-100000);　　　//　true
Number.isInteger(0.1);　　　//　false
Number.isInteger(3.14);　　//　false
Number.isInteger(NaN);　　　//　false
Number.isInteger(Infinity);　　//　false
Number.isInteger('10');　　//　false
Number.isInteger(true);　　//　false
Number.isInteger(false);　//　false

Browser Compatibility

The number in the table specifies the first browser version that fully supports the isInteger() method:

Parameter Value

Technical Details

　JavaScript Number Object