pseudocode

first thing you have to know is how to design the program to know its operation

PSEUDOCODE
pseudocode is a description of compact and high-level operating informal1 principle of a computer program or other algorithm.
Uses the structural conventions of a programming language real, but is designed for human reading rather than machine readable, and independently of any other programming language. Normally, the pseudocode omits details that are not essential to human understanding of the algorithm, such as variable declarations, system-specific code and some subroutines. The programming language is supplemented, where appropriate, with detailed descriptions in natural language, or with compact mathematical notation. Pseudocode is used because this is easier to understand for people who code conventional programming language because it is an efficient and independent environment with the fundamental principles of an algorithm description.