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parseInt Method

Returns an integer converted from a string.

function parseInt(numString : String [, radix : Number]) : Number

Arguments

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 hexadecimal and strings with a prefix of '0' are considered octal. All other strings are considered decimal.

Remarks

The parseInt method returns a whole number 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.

You can test for NaN using the isNaN method.

Example

In following example, the parseInt method is used to convert two strings to numbers.

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

Requirements

Version 1

See Also

isNaN Method | parseFloat Method | String Object | valueOf Method

Applies To: Global Object

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