JavaScript isFinite() Function

　JavaScript Global Properties/Function

GlobalisFinite()The function determines whether the value passed is finite.

The isFinite function checks the number in the parameter. If the parameter is NaN, positive infinity, or negative infinity, this method returns false; otherwise, it returns true.

Syntax:

isFinite(value)

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

Browser Compatibility

All browsers fully support the isFinite() function:

Parameter Value

Technical Details

　JavaScript Global Properties/Function