MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE, Справочник

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86 ActionScript language elements
Returns
Number
- The ASCII code number of the specified character.
See also
String
,
charCodeAt (String.charCodeAt method)
parseFloat function
parseFloat(string:String) : Number
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.
Availability: ActionScript 1.0; Flash Player 5
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