It is an algorithm flowchart example, from which it decides which variable need to print. Firstly, input values X, Y, and Z, then read them and compare them according to the values. A flowchart is easy to show the algorithm relations, and visualize the links or the relationship among numbers. It is usually used in the Math and relative subject research, which helps to simplify the complex mathmatic questions. Check this flowchart, and learn more in this template gallery.