What is the operator to calculate the remainder of a division in Python?

The % (modulo) operator calculates the remainder of a division in Python. For example, 7 % 3 returns 1 because 7 divided by 3 is 2 with a remainder of 1. This operator is useful for determining whether one number is divisible by another (the remainder would be 0), for switching between values, or for keeping a value within a specific range (as in hashing algorithms).