🧠 Functions in Python – The Magic of Repeating Code Easily!

 Hello young coder! 👋

Today, we’re going to explore something magical in Python: Functions!
Think of a function as a reusable mini-program inside your big program.

Let’s dive into it! 🚀

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🔍 What is a Function?

A function is like a recipe in cooking. You write the steps once and use them again and again whenever needed — without writing the same steps every time!

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🛠️ Why Use Functions?

• 📦 Organize your code into small, useful parts

• 🧹 Avoid repeating the same code

• 🚀 Make your programs easier to read and fix

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🐍 How to Write a Function in Python

Here’s the basic format:

def function_name():
    # code to run

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👋 Example 1: Say Hello

def say_hello():
    print("Hello, young coder!")

To use the function, just call it by its name:

say_hello()

✅ Output:
Hello, young coder!

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📥 Example 2: A Function With Input (Parameters)

def greet(name):
    print("Hi", name + "!")

greet("Aarav")
greet("Zoya")

✅ Output:

nginx

Hi Aarav!
Hi Zoya!

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🔁 Example 3: A Function That Gives Back a Value (Return)

def add_numbers(a, b):
    return a + b

result = add_numbers(3, 5)
print("Sum is:", result)

✅ Output:
Sum is: 8

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✨ Let's Build a Fun Program

Try this mini calculator:

def calculator(a, b):
    print("Addition:", a + b)
    print("Subtraction:", a - b)
    print("Multiplication:", a * b)
    print("Division:", a / b)

calculator(10, 2)

🎉 This small function performs 4 different operations with just one call!

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🧠 Quick Recap

Term	What It Means
def	Keyword to define a function
Function	A block of code that runs when you call it
Parameter	Extra info you give to the function
return	Gives back a value from the function

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🏁 Final Thoughts

Using functions is like building your own coding toolbox. You write your tools once and use them whenever you want!

So go ahead — create your own Python tools with functions and become a super coder! 💻✨

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