JavaScript Number isFinite() Method

　JavaScript Number Object

isFinite()The method determines whether the passed value is a finite number.

If the type of the value is Number, this method returns true and is equal to a finite number. Otherwise, it returns false.

With globalisFinite()Compared to the function, this method does not force the parameter to be converted to a number.

This means that only values of type Number (which are also finite) return true.

Syntax:

Number.isFinite(value)

Number.isFinite(451);　　　//　true
Number.isFinite(-3.13);　//　true
Number.isFinite(3-1);　　　//　true
Number.isFinite(0);　//　true
Number.isFinite("451");　//　false
Number.isFinite("Hello");　　　//　false
Number.isFinite("20/12/2018");　　//　false

Browser Compatibility

The numbers in the table specify the first browser version that fully supports the isFinite() method:

Parameter Value

Technical Details

　JavaScript Number Object