Round number up to the nearest multiple of 3

Question

Hay, how would i go about rounded a number up the nearest multiple of 3?

ie

25 would return 27
1 would return 3
0 would return 3
6 would return 6
         


        

Answer 1

Using remainder operator (modulus):

(n - 1 - (n - 1) % 3) + 3