modulo (%)

The modulo operation:

• divdend % divisor = remainder
• divident mod divisor = remainder
• a % 1 is always 0 because a / 1 = a
• a % a is always 0 because a / a = 1
• a % 0 is not defined because a / 0 is not
• a % b = c where c will always in [0,b) when a > b
• a % b = a when b > a
  • “b divides a zero times, so everything remains”

You can check if something is odd by seeing if it is divisible by 2: n % 2 != 0

TODO: Examples and clever use:

• clock
• circular arrays (buffer)