How to find next number divisible by n

Asked by Pedro Oliveira on 22 Nov 2017

Latest activity Commented on by Pedro Oliveira on 22 Nov 2017

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Hi, I have a number 'a' and I want to find the next number 'b' that is divisible by a certain n (if 'a' isn't divisible by n).

Initially I was doing it like below:

b = a + rem(a,n)

But I noticed that it gives the distance to the closest number that is divisible by n. In the specific example of being a = 14 and n = 4, rem(a,n) gives 2 since the closes number divisble by 4 is 12. Thus b will be 14 (not divisible by 4) instead of 16, as originally intended.

Thank you for any help you can provide.

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Answer by Torsten on 22 Nov 2017

Accepted Answer

b = a + (n - rem(a,n))

Best wishes

Torsten.

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Pedro Oliveira on 22 Nov 2017

This works! Thank you!

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Answer by David J. Mack on 22 Nov 2017

How about

b = n * ceil(a / n)

Greetings, David

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Pedro Oliveira on 22 Nov 2017

This also works! Thank you! I didn't know the ceil function but I'll look into it.

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