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Lesson 2

Parameters & Returns

Pass data to functions

1What are Parameters?✨

Parameters are special variables in functions that allow you to pass data into them. This makes your functions more flexible and reusable. When you define a function, you can specify parameters to accept input.

2Example of Parameters:🎯

💻 code
def greet(name):
    print("Hello, " + name + "!")
💻 code
greet("Alice")
greet("Bob")

In this example, `name` is a parameter that takes the values "Alice" and "Bob".

3Why Use Parameters?💡

  • ✓ Make functions reusable with different data
  • ✓ Reduce code duplication
  • ✓ Simplify complex programs by breaking them into smaller functions

4Returning Values from Functions🚀

Functions can also send back values using the `return` statement. This allows you to capture the output of a function and use it later in your code.

5Example of Return Values:🔍

💻 code
def add_numbers(a, b):
    return a + b
💻 code
result = add_numbers(5, 3)
print(result)

Here, `add_numbers` returns the sum of `a` and `b`, which we store in the variable `result`.

6Combining Parameters and Returns⭐

You can use both parameters and return values to create powerful functions. This helps in building more complex and interactive programs.

7Example:🧩

💻 code
def multiply(x, y):
    return x * y
💻 code
product = multiply(4, 6)
print(product)

In this case, the function `multiply` takes two parameters and returns their product.

8Practice Makes Perfect🎈

Now it's your turn! Try creating a function that takes two numbers and returns their difference. Use parameters effectively and see what you can create!

🎯 Practice Challenges

Master Parameters & Returns by completing all 3 difficulty levels

🟢 EASY

Parameters & Returns - Easy Challenge

Start with the basics. Perfect for beginners!

🟡 MEDIUM

Parameters & Returns - Medium Challenge

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🔴 HARD

Parameters & Returns - Hard Challenge

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