parseFloat Method

Returns a floating-point number converted from a string.


The required numString argument is a string that contains a floating-point number.


The parseFloat method returns a numerical value equal to the number contained in numString. If no prefix of numString can be successfully parsed into a floating-point number, NaN (not a number) is returned.

parseFloat("abc")      // Returns NaN.
parseFloat("1.2abc")   // Returns 1.2.

You can test for NaN using the isNaN method.


Version 1

See Also

isNaN Method | parseInt Method | String Object

Applies To: Global Object