Logical value: 0 is false, non-0 is true.

Logical operation is also called Boolean operation. Boolean used mathematical methods to study logical problems and successfully established logical calculus. In 1930s, logic algebra was applied to circuit systems. Subsequently, due to the development of electronic technology and computer, various complex large-scale systems appeared, and the transformation law also followed the law revealed by Boolean. Logical operations are usually used to test true values and false values. The most common logical operation is loop processing, which is used to judge whether to leave the loop or continue to execute the instructions in the loop.