parsefloat-function-javascript.md

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parseFloat Function (JavaScript) | Microsoft Docs		01/18/2017	windows-client-threshold			devlang-javascript		language-reference	parseFloat	JavaScript TypeScript DHTML	parseFloat method	a7d87a69-1919-4623-be85-972e6376dd2d	14	mikejo5000	mikejo	ghogen

parseFloat Function (JavaScript)

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

[!INCLUDEjsv1]

Applies To: Global Object

See Also

isNaN Function
parseInt Function
String Object