Converts a string to a floating-point number.
Syntax
parseFloat(numString)
Remarks
The required numString argument is a string that contains a floating-point number.
The parseFloat function 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 function.
Requirements
Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.
Applies To: Global Object