Question
What does the % mean in this list comprehension example?
Answer
In Python the % symbol is the modulo operator and returns the remainder after division is performed.
If we do 10 % 2, we get 0 as the result, since 10 / 2 leaves no remainder.
But if we do 10 % 3 we get 1 because 3 goes into 10 3 times with a remainder of 1.
A common use of modulo is checking whether a number is divisible by something by doing if number % number == 0:.