MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT, Reference Manual

Page: 589 / 816

parseInt 589
parseInt
Availability
Flash Player 5.
Usage
parseInt( expression [ , radix ])
Parameters
expression
A string to convert to a integer.
radix
Optional; an integer representing the radix (base) of the number to parse. Legal values
are from 2 to 36.
Returns
A number or
NaN
.
Description
Function; converts a string to an integer. If the specified string in the parameters cannot be
converted to a number, the function returns
NaN
. Strings beginning with 0x are interpreted as
hexadecimal numbers. Integers beginning with 0 or specifying a radix of 8 are interpreted as octal
numbers. White space preceding valid integers is ignored, as are trailing nonnumeric characters.
Example
The following examples use the
parseInt
function to evaluate various types of numbers.
parseInt("3.5")
// returns 3
parseInt("bar")
// returns NaN
parseInt("4foo")
// returns 4
The following are examples of hexadecimal conversions:
parseInt("0x3F8")
// returns 1016
parseInt("3E8", 16)
// returns 1000
The following is an example of a binary conversion:
parseInt("1010", 2)
// returns 10 (the decimal representation of the binary 1010)
The following are examples of octal number parsing:
parseInt("0777")
parseInt("777", 8)
// returns 511 (the decimal representation of the octal 777)