All programming languages reserve certain words to have a special meaning. These words are called keywords .

With keywords, the programmer can issue commands to the compiler or interpreter. They let you tell the computer what to do. Without keywords, the computer could not make sense from the seemingly random text in your code file. Note that as keywords are reserved words, you cannot use them as variable names.

The most important Python keywords are the following.

1. False
2. True
3. and
4. or
5. not
6. break
7. continue
8. class
9. def
10. if
11. elif
12. else
13. for
14. while
15. in
16. is
17. None
18. lambda
19. return