This video is a bit long, but i show all these masteries.
The conditionals if, else, elif and of course you nest statements in each condition.
Masteries: 15. Use of the conditional “if”; 16. Use of “else” with a conditional; 17. Use of “elif” with a conditional; 18. Nesting of conditional statements by Lourdes García is licensed under a Creative Commons Attribution 4.0 International License.