How do I find the next multiple of 10 of any integer?

Question

Dynamic integer will be any number from 0 to 150.

i.e. - number returns 41, need to return 50. If number is 10 need to return 10. Number is 1 need to return 10.

Answer 1

round_up(int i) 
{
      while(i%10) {
            i++;
      }
      return(i);
}