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Why is it vital to define functions while developing code?

Why is it vital to define functions while developing code?

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Why is it vital to define functions while developing code?
Transcribed Image Text:Why is it vital to define functions while developing code?
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Step 1

Definition of functions within code is very important, since it makes code easy to write for the user.

We define functions because...

  • They enable us to visualize our plan as a series of smaller steps. 
    (Each sub-step may have a separate purpose. 
    If a program seems too difficult, simply divide it into smaller steps.).
  • Programmers can divide an issue into smaller, more manageable parts, each of which can carry out a specific task, using functions.
  • Instead of building new code, they let us reuse old code.
  • We can test/check  discrete sections (separate parts) of our software independently of the rest because of  functions. 
    This is particularly true when being translated.

Now, below code shows how we use same function twice and have separated the function from main code.

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