#How to a mod mod#

The first cipher that youвЂ™ll look at is the Caesar cipher, named after Julius Caesar, who used it to secretly communicate messages. In this section, youвЂ™ll look at two ciphers, the Caesar cipher and the VigenГЁre cipher. A cipher is a type of algorithm for performing encryption and decryption on an input, usually text.

The Python modulo operator can be used to create ciphers.

#How to a mod mod#

You need to take the result, 17, and use mod to get its equivalent value in a twelve-hour context:

On a twelve-hour clock, you canвЂ™t simply add 9 to 8 because you would get 17. The modulo operator is used when you want to compare a number with the modulus and get the equivalent number constrained to the range of the modulus.ДЇor example, say you want to determine what time it would be nine hours after 8:00 a.m. A twelve-hour clock can be classified as вЂњmodulo 12,вЂќ sometimes shortened to вЂњmod 12.вЂќ When counting on a twelve-hour clock, you count up to the modulus 12 and then wrap back to 1. A twelve-hour clock has a fixed set of values, from 1 to 12. All arithmetic operations performed on this number line will wrap around when they reach a certain number called the modulus.ДЄ classic example of modulo in modular arithmetic is the twelve-hour clock. Modular arithmetic deals with integer arithmetic on a circular number line that has a fixed set of numbers. The term modulo comes from a branch of mathematics called modular arithmetic. Free Bonus: Click here to get a Python Cheat Sheet and learn the basics of Python 3, like working with data types, dictionaries, lists, and Python functions.