Functions in Python

Functions in Python

A function is a block of code which only runs when it is called. You can pass data, known as parameters, into a function. Python gives you many built-in functions like print(), etc. but you can also create your own functions.

Alright, let’s start with what functions actually are?

  • OK, a function is a piece of code.
  • A function may/may not accept input(s).
  • A function may/may not return an output(s).

Why do we need functions in a program?

  • Well, the Reusability of the code in a program is made possible through functions.
  • The program can call these so-called functions, n - number of times.
  • This showcases the best practice in a program called DRY.

DRY - Do not Repeat Yourself

  • A code is said to be DRY if any given code does not repeat certain tasks
  • A function implements this just by writing once and using whenever necessary.





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