How do i not have 0 in the output

Question

You are given a program that outputs all the numbers from 0 to 20.
Change the code to make it output only numbers that are multiples of 3.

Answer 1

No idea what you are talking about!

Answer 2

You can use if inside the for loop to display only number divisible by 3
for(int i =0;i<=20;i++) if(i%3 == 0) cout<<i<<"\n";