User Guide

parseFloat() 685
parseFloat()
Availability
Flash Player 5.
Usage
parseFloat(string:String) : Number
Parameters
string
The string to read and convert to a floating-point number.
Returns
A number or NaN (not a number).
Description
Function; 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.
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, parseInt()
CHAPTER 2
ActionScript Language Reference