One of my fellow contributors here recently wrote a post about leap years and why we have them. This reminded me of modular arithmetic and the formula for calculating the day of the week for any ...

This is what mathematicians call addition “modulo 360.” Likewise, we can do addition modulo any whole number N instead of 360. (Another familiar example is adding hours, where N = 12.) ...

Basic Operations Used RC6 operates on units of four w-bit words using these six basic operations a+b integer addition modulo 2w a -b integer subtraction modulo 2w a ?b bitwise exclusive-or of w-bit ...