Math

The Math object is a built-in static object. The Math object's properties and methods are accessed directly (e.g., Math.PI) and are used for performing complex math operations. Some common math properties and methods are shown below:

Common Math Properties

Property	Description
Math.PI	The value of Pi ()
	Math.PI; //3.141592653589793
Math.SQRT2	Square root of 2.
	Math.SQRT2; //1.4142135623730951

Math.abs(-12); //Returns 12

Math.ceil(5.4); //Returns 6

Math.floor(5.6); //Returns 5

Math.max(2, 5, 9, 3); //Returns 9

Math.min(2, 5, 9, 3); //Returns 2

Math.pow(2, 5); //Returns 32

Math.round(2.5); //Returns 3

Math.random();
//Returns random
//number from 0 to 1

You can see these examples in a browser by opening BuiltInObjects/Demos/MathPropertiesAndMethods.html.

Method for Generating Random Integers

Because Math.random() returns a decimal value greater than or equal to 0 and less than 1, we can use the following code to return a random integer between low and high, inclusively:

var low = 1;
var high = 10;
var rndDec = Math.random();
var rndInt = Math.floor(rndDec * (high - low + 1) + low);