Math.sqrt() - MACROMEDIA FLASH MX 2004-ACTIONSCRIPT LANGUAGE Reference

Math.sqrt()

Availability
Flash Player 5. 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.
Usage
Math.sqrt(x:Number) : Number
Parameters
A number or expression greater than or equal to 0.
x
Returns
A number if parameter x is greater than or equal to zero; NaN (not a number) otherwise.
Description
Method; computes and returns the square root of the specified number.
Example
The following example uses
this.createEmptyMovieClip("canvas_mc", this.getNextHighestDepth());
var mouseListener:Object = new Object();
mouseListener.onMouseDown = function() {
this.origX = _xmouse;
this.origY = _ymouse;
};
mouseListener.onMouseUp = function() {
this.newX = _xmouse;
this.newY = _ymouse;
var minY = Math.min(this.origY, this.newY);
var nextDepth:Number = canvas_mc.getNextHighestDepth();
var line_mc:MovieClip =
canvas_mc.createEmptyMovieClip("line"+nextDepth+"_mc", nextDepth);
line_mc.moveTo(this.origX, this.origY);
line_mc.lineStyle(2, 0x000000, 100);
line_mc.lineTo(this.newX, this.newY);
var hypLen:Number = Math.sqrt(Math.pow(line_mc._width,
2)+Math.pow(line_mc._height, 2));
line_mc.createTextField("length"+nextDepth+"_txt",
canvas_mc.getNextHighestDepth(), this.origX, this.origY-22, 100, 22);
line_mc['length'+nextDepth+'_txt'].text = Math.round(hypLen) +" pixels";
};
Mouse.addListener(mouseListener);
and
Math.pow Math.sqrt
to calculate the length of a line.
Math.sqrt() 443