In an ideal environment, you have an excellent debugger available that easily makes the behavior of your program transparent so you can quickly discover errors. However, most debuggers have blind spots, and these will require you to embed code snippets in your program to help you understand what’s going on. In addition, you may be developing in an environment (such as an embedded system, which is where I spent my formative years) that has no debugger available, and perhaps very limited feedback (i.e. a one-line LED display). In these cases you become creative in the ways you discover and display information about the execution of your program. This section suggests some techniques for doing this.