Introduction

Introduction to Python ProgrammingIntroduction

a group of trees with paths on either side

Figure 4.1 credit: modification of work "Fork In The Road", by Ian Sane/Flickr, CC BY 2.0

Chapter Outline

4.1 Boolean values

4.2 If-else statements

4.3 Boolean operations

4.4 Operator precedence

4.5 Chained decisions

4.6 Nested decisions

4.7 Conditional expressions

4.8 Chapter summary

The Python interpreter follows a single path of execution when executing a program. What if a programmer wants to define multiple possible paths? Ex: Instead of always taking the left path, a program uses the path width to decide which path to take. If the left path is wider, take the right path. Else, take the left path.

A branch is a group of statements that execute based on a condition. The Expressions chapter introduced expressions. This chapter explores how expressions can be used as conditions to make decisions in programs.

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- Authors: Udayan Das, Aubrey Lawson, Chris Mayfield, Narges Norouzi
- Publisher/website: OpenStax
- Book title: Introduction to Python Programming
- Publication date: Mar 13, 2024
- Location: Houston, Texas
- Book URL: https://openstax.org/books/introduction-python-programming/pages/1-introduction
- Section URL: https://openstax.org/books/introduction-python-programming/pages/4-introduction

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