User Guide

418 ActionScript classes
See also
acos (Math.acos method), asin (Math.asin method), atan (Math.atan method),
atan2 (Math.atan2 method), sin (Math.sin method), tan (Math.tan method)
E (Math.E property)
public static E : Number
A mathematical constant for the base of natural logarithms, expressed as e. The approximate
value of eis 2.71828182845905.
Availability: ActionScript 1.0; Flash Lite 2.0 - In Flash Player 4, the methods and properties
of the Math class are emulated using approximations and might not be as accurate as the non-
emulated math functions that Flash Player 5 supports.
Example
This example shows how
Math.E is used to compute continuously compounded interest for a
simple case of 100 percent interest over a one-year period.
var principal:Number = 100;
var simpleInterest:Number = 100;
var continuouslyCompoundedInterest:Number = (100 * Math.E) - principal;
trace ("Beginning principal: $" + principal);
trace ("Simple interest after one year: $" + simpleInterest);
trace ("Continuously compounded interest after one year: $" +
continuouslyCompoundedInterest);
//
Output:
Beginning principal: $100
Simple interest after one year: $100
Continuously compounded interest after one year: $171.828182845905
exp (Math.exp method)
public static exp(x:Number) : Number
Returns the value of the base of the natural logarithm (e), to the power of the exponent
specified in the parameter
x. The constant Math.E can provide the value of e.
Availability: ActionScript 1.0; Flash Lite 2.0 - In Flash Player 4, the methods and properties
of the Math class are emulated using approximations and might not be as accurate as the non-
emulated math functions that Flash Player 5 supports.