Learn to Program with Python 3: A Step-by-Step Guide to Programming

© Irv Kalb 2018

Irv KalbLearn to Program with Python 3https://doi.org/10.1007/978-1-4842-3879-0_5

5. if, else, and elif Statements

Irv Kalb¹ 

(1)

Mountain View, California, USA

 

All the code we have looked at so far has essentially been linear. That is, execution of the code starts from the top and goes straight through to the bottom. The only change to this linear nature of execution is when we make a function call. Doing that transfers control to the function, but all the code inside a function also goes straight through from top to bottom. But one of the most powerful things about code is the ability to make a decision and to take a path based on that decision.

This chapter discusses the following topics:

• Flowcharting

• The if statement

• Comparison operators ...