See Also Applies To

Description

Converts strings into integers.

Syntax

parseInt(numstring, [radix])

The parseInt method syntax has these parts:

Part	Description
numstring	Required. A string to convert into a number.
radix	Optional. A value between 2 and 36 indicating the base of the number contained in numstring. If not supplied, strings with a prefix of '0x' are considered hexidecimal and strings with a prefix of '0' are considered octal. All other strings are considered decimal.

Remarks

The parseInt method returns an integer value equal to the number contained in numstring. If no prefix of numstring can be successfully parsed into an integer, NaN (not a number) is returned.

parseInt("abc") // Returns NaN.
parseInt("12abc") // Returns 12.

You can test for NaN using the isNaN method.