Python Mastery – From Basics to Brilliance / Functions

Built-in Functions vs Custom Functions

🐍 Built-in Functions

Built-in functions are functions already provided by Python.
We can use them directly without defining them.

Examples:

print("Hello")
len("Python")
type(10)
sum([1, 2, 3])
max(10, 20)

πŸ‘¨β€πŸ’» Custom Functions

Custom functions are functions created by the programmer using the def keyword.

def greet(name):
    print("Hello", name)

greet("Codeveda")

Here, greet() is a custom function.


βš–οΈ Difference

Built-in Functions 🐍

Custom Functions πŸ‘¨β€πŸ’»

Already provided by Python

Created by the programmer

No need to define them

Defined using def

Ready to use

Designed for a specific requirement

print(), len(), type()

greet(), calculate(), login()