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Learn Python in 7 Days

You're reading from   Learn Python in 7 Days Begin your journey with Python

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Product type Paperback
Published in May 2017
Publisher Packt
ISBN-13 9781787288386
Length 280 pages
Edition 1st Edition
Languages
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Authors (2):
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Mohit Raj Mohit Raj
Author Profile Icon Mohit Raj
Mohit Raj
Bhaskar N. Das Bhaskar N. Das
Author Profile Icon Bhaskar N. Das
Bhaskar N. Das
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Toc

Table of Contents (12) Chapters Close

Preface 1. Getting Started with Python FREE CHAPTER 2. Type Variables and Operators 3. Strings 4. Lists 5. Dictionary 6. Control Statements and Loops 7. Function and Scope of Variable 8. Modules and Packages 9. File Handling and Exceptions 10. Collections 11. Class and Objects

Functions


The big question arising in the minds of the beginner would be, "What are functions?" and "Why are they necessary in any programming language?"

Functions are nothing but a small programming unit inside a big programming construct that generates a designated output. Let's try to understand with real-world scenario. It's difficult to think of a scenario where someone may not have access to television. What do you observe inside a normal television? On broader classification, considering a normal viewer, it has three functions:

  • It has a display unit
  • It has a volume control unit
  • It has a channel tuning setup embedded inside the electronic circuitry

Although modern smart televisions have more complex functions, we will restrict our example to three main functions explained.

The display unit works differently from the other two functional units and its sole purpose is to put up a display to the user. Similarly, the volume control unit has its sole purpose to fine-tune the volume of the television...

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