Applies to: Global Object
The parseInt method is use to converted a string to an integer.
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. |
Return value
Returns an integer converted from a string.
Example
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.
document.write(parseInt("abc"));// Returns NaN.
document.write(parseInt("12abc"));// Returns 12.
|
You can test for NaN using the isNaN method.
 To run the code above, paste it into JavaScript Editor, and click the Execute button.
See also: isNaN Method, parseFloat Method, String Object, valueOf Method |
