FLASH® LITE™ 2.x - Adobe Help and Support

Converts a string to a floating-point number. The function reads, or parses, and returns the
numbers in a string until it reaches a character that is not a part of the initial number. If the
string does not begin with a number that can be parsed, parseFloat() returns NaN. White
space preceding valid integers is ignored, as are trailing nonnumeric characters.
Parameters
string:String - The string to read and convert to a floating-point number.
Returns
Number - A number or NaN (not a number).
Example
The following examples use the parseFloat() function to evaluate various types of numbers:
trace(parseFloat("-2")); // output: -2
trace(parseFloat("2.5")); // output: 2.5
trace(parseFloat(" 2.5")); // output: 2.5
trace(parseFloat("3.5e6")); // output: 3500000
trace(parseFloat("foobar")); // output: NaN
trace(parseFloat("3.75math")); // output: 3.75
trace(parseFloat("0garbage")); // output: 0
See also
NaN constant, parseInt function
parseInt function
parseInt(expression:String [, radix:Number]) : Number
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.
Parameters
expression:String - A string to convert to an integer.
radix:Number [optional] - An integer representing the radix (base) of the number to parse.
Legal values are from 2 to 36.
Returns
Number - A number or NaN (not a number).
70 ActionScript language elements