Hacking the Math.round() method

The Timely Measurements Assignment asks you to round your output to a certain number of decimals. There are many ways to round using javascript, here I'll discuss one way by hacking the Math.round() method.

• Math.round() - rounds to the nearest integer (if the decimal is 0.5 or greater it rounds up, otherwise it rounds down.)
• Math.ceil() - rounds up to the next integer.
• Math.floor() - rounds down.

Let's do some examples:
var x = 2.71828182845;
Math.round(x);
Math.ceil(x);
Math.floor(x);