ActionScript for Flash MX: The Definitive Guide, Second Edition

Math.PI Property

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ActionScript Language Reference

Description

The min( ) function compares two numbers and returns the smaller of the two. When

comparing two negative numbers, the one with a larger absolute value is actually smaller

(see the following Example). If used on strings, min( ) returns

NaN.

Example

Math.min(5, 1); // Returns 1

Math.min(-6, -5); // Returns -6

Math.min(Math.abs(-6), Math.abs(-5)); // Returns 5

Reader Exercise: Modify the example under Math.max( ) to return the minimum value in

an array rather than the maximum.

See Also

Math.abs( ), Math.max( )

Math.PI Property

the ratio of a circle’s circumference to its diameter, approximately 3.14159

Flash 5; can be used when exporting Flash 4 movies

Math.PI

Description

The PI property represents the constant π, the ratio of the circumference of a circle to its

diameter.

Example

Math.PI is famously used in calculating the area of a circle:

function circleArea (radius) {

// PI times the radius squared can also be written

// as Math.PI * Math.pow(radius, 2)

return Math.PI * (radius * radius);

}

See Also

Math.cos( ), Math.sin( )

Math.pow() Method

raise a number to a specified power

Flash 5; can be used when exporting Flash 4 movies

Math.pow(base, exponent)

Arguments

base A number representing the base of the exponential expression.

exponent ...