modulo

Just subtract 1 and add 1 afterwards. In most programming languages, you need to watch out when finding a “previous” value, because for negative numbers, modulo does not work as you want in this case: it returns a negative number. Here’s the C/C++ version: int next(int i, int m, int n) { return (i + … Read more

Does this help 22 % 5 = 2 17 % 5 = 2 12 % 5 = 2 7 % 5 = 2 2 % 5 = 2 Maybe this 22 / 5 = 4 + 2/5 17 / 5 = 3 + 2/5 12 / 5 = 2 + 2/5 7 / 5 = … Read more

Mod just means you take the remainder after performing the division. Since 4 goes into 2 zero times, you end up with a remainder of 2.