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);