Math.PI Property

	ActionScript for Flash MX: The Definitive Guide, 2nd Edition By Colin Moock
	Chapter 18.  ActionScript Language Reference

Math.PI Property

Flash 5; can be used when exporting Flash 4 movies

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

Math.PI

Description

The PI property represents the constant , 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( )