How to wrap this value?

Question

Example: I have a scale between 1 and 7. When I get a value like 8, I want it to be wrapped on that scale so it's converted to 1. More examples:

• 1 results in 1
• 5 results in 5
• 7 results in 7
• 8 results in 1
• 9 results in 2
• 10 results in 3
• 11 results in 4
• 12 results in 5
• 13 results in 6
• 14 results in 7
• 15 results in 1
• 16 results in 2

and so on.

Is there a method or useful C-function to do that? Something tells me I just need a modulo. It's 42°C in my room. My brain is like soap.

Answer 1

Try ((number - 1) % 7) + 1.

Answer 2

int b = ((a-1) % 7) + 1;

Check using Excel, of all things!

Yes it's HOT today.. arrgh!