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

Question

Using Javascript, I would like to round the number passed by the user to the nearest 10. For example, if 7 is transmitted, I must return 10, if 33 is transmitted, I must return 30.

Answer 1

Divide the number by 10, round the result and multiply it by 10 again:

var number = 33; console.log(Math.round(number / 10) * 10); 

Answer 2

 Math.round(x / 10) * 10 

Answer 3

Where i is int.

To round to the nearest multiple of 10 ie

11 becomes 10
19 becomes 10
21 becomes 20

 parseInt(i / 10, 10) * 10; 

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To round to the nearest multiple of 10 ie

11 becomes 20
19 becomes 20
21 becomes 30

 parseInt(i / 10, 10) + 1 * 10; 

Answer 4

I need something like this, so I wrote a function. I used the function for decimal rounding here , and since I also use it to round integers, I also set it as the answer. In this case, just enter 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; }