# How to round an integer up or down to the nearest 10 using Javascript

Using Javascript, I would like to round a number passed by a user to the nearest 10. For example, if 7 is passed I should return 10, if 33 is passed I should return 30. Divide the number by 10, round the result and multiply it with 10 again:

``````var number = 33;
console.log(Math.round(number / 10) * 10);`````` ``````Math.round(x / 10) * 10
`````` Where `i` is an int.

To round down to the nearest multiple of 10 i.e.

11 becomes 10
19 becomes 10
21 becomes 20

``````parseInt(i / 10, 10) * 10;
``````

To round up to the nearest multiple of 10 i.e.

11 becomes 20
19 becomes 20
21 becomes 30

``````parseInt(i / 10, 10) + 1 * 10;
`````` I needed something similar, so I wrote a function. I used the function for decimal rounding here, and since I also use it for integer rounding, I will set it as the answer here too. In this case, just pass in the number you want to round and then 10, the number you want to round to.

``````function roundToNearest(numToRound, numToRoundTo) {
return Math.round(numToRound / numToRoundTo) * numToRoundTo;
}
``````