C Language Keywords
Part of the Beginning C Programming For Dummies Cheat Sheet
The C language keywords represent the core of the language. With the C11 revision to the language, several new keywords have been added. They're shown with leading underscores in the following table:
Keep the following points in mind as you start programming in C:
Do not name any function or variable the same as a keyword.
You use only a few of the C language keywords in your code. Some of them, you'll probably never use.
Most of the work in your code is done by functions, not by keywords.