sqrt (Math.sqrt method)

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.

Parameters

Returns

Number - A number if parameter x is greater than or equal to zero; NaN (not a number) otherwise.

Example

The following example uses Math.pow and Math.sqrt to calculate the length of a line.

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);