Bugs are mistakes in code. A bug can make a program work incorrectly or even crash a computer. So, debugging code is one of the most important tasks that programmers have to tackle! This accessible, at-level book teaches readers about debugging and how it's crucial to their everyday digital activities—such as playing their favorite computer games. Readers will especially enjoy the photographs of young programmers like themselves at work as well as learning about two famous programmers—Grace Hopper and Alan Turing—and how what they accomplished through their knowledge of coding.