I didn't understand modulo in python. Please explain.

Answer 1

The modulo operator divides two numbers and returns the remainder.
Example: 7%6=1

Answer 2

Basically what Caleb wrote is right. But it gets tricky when negatives come in:

14 % 5 = 4
14 % -5 = -1
-14 % 5 = 1
-14 % -5 = -4

In Python, unlike some other languages, the modulo result always has the same sign as the divisor (observe the sign of 5 in this example).

Answer 3

thanks caleb and kuba for explaining the modulo