Going to answer your question concerning modulo.
Modulo works with division in that it returns the remainder and not the quotient. It's also a very good way to check if a number is divisible by another number. If the result is any number other than 0, it's not divisible.
If you were to do this: 3 % 2, it will return 1. Standard mode for calculators don't allow the % sign to be used for modulo. Calculators in scientific mode will have a Mod button. So can do 3 Mod 2 as well.
In programming(at least for JS) you can use %.
Last edited by Rasikko; 20/10/17 02:04 PM.