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Flash Player 5.
parseFloat(string)
string The string to read and convert to a floating-point number.
A number or Nan.
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.
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
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