The English used in this article or section may not be easy for everybody to understand. (February 2021)
In mathematics, the modulo operation works out the remainder (what's left over) when we divide two integers (whole numbers without a fraction or a decimal) together. For example, 5 modulo 2 is 1, because if we divide 5 by 2, then we get 2 (because ) with 1 left over. Instead of writing modulo, people sometimes write . 
- "Definition of MODULUS". www.merriam-webster.com. Retrieved 2021-02-06.