[motor4ik]

смотрим класс Math

Math class
Availability
Flash Player 5. In Flash Player 4, the methods and properties of the Math class are emulated using approximations and may not be as accurate as the non-emulated math functions supported by Flash Player 5.

Math.sqrt()
Computes a square root.

a^2=a*a !!
a^3=a*a *a!!

a=4;
b=1;
stepen=4;

for (i=0;i<stepen;i++){
b*=a;
}

trace(b);

function stepen(a:Number,c:Number):Void{
	var b:Number=1;
	for (i=0;i<c;i++){
		b*=a;
	}
	trace(b);
}


stepen(2,4);