What does the % operator do in Ruby in N % 2?

Question

if counter % 2 == 1 I am trying to decode this line - it\'s a Rails project and I am trying to figure out what the % does in this if statement.

Answer 1

That's the modulo operator. It gives the remainder when counter is divided by 2.

For example:
3 % 2 == 1  
2 % 2 == 0