MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT - Page 588

588 Chapter 12: ActionScript Dictionary
parseFloat()
Availability
Flash Player 5.
Usage
parseFloat(string)
Parameters
string
The string to read and convert to a floating-point number.
Returns
A number or Nan.
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.
parseFloat("-2") returns -2
parseFloat("2.5")
returns 2.5
parseFloat("3.5e6")
returns 3.5e6, or 3500000
parseFloat("foobar") returns NaN
parseFloat(" 5.1")
returns 5.1
parseFloat("3.75math")
returns 3.75
parseFloat("0garbage") returns 0
See also
NaN