Why different argument types are needed in Python - See It in Action

Why Different Argument Types Are Needed

📖 Scenario: Imagine you are creating a simple calculator program that can add numbers. Sometimes you want to add two numbers, sometimes three, and sometimes you want to add numbers stored in a list. To do this, you need to understand why functions need different types of arguments.

🎯 Goal: You will build a Python function that can add numbers using different types of arguments: fixed arguments, default arguments, and variable-length arguments. This will help you see why different argument types are useful in real life.

📋 What You'll Learn

Create a function with two fixed arguments

Add a default argument to the function

Use variable-length arguments to add any number of numbers

Print the results of calling the function with different argument types

💡 Why This Matters

🌍 Real World

In real-world programs, functions often need to handle different numbers and types of inputs. Understanding argument types helps you write flexible and reusable code.

💼 Career

Knowing how to use different argument types is important for software developers to create clear and adaptable functions that work well in many situations.

1

Create a function with two fixed arguments

Write a function called add_two_numbers that takes exactly two arguments named a and b. The function should return the sum of a and b.

Python

# Your code here

Need a hint?

Use def to create the function and return the sum of a and b.

2

Add a default argument to the function

Modify the function add_two_numbers to add a third argument called c with a default value of 0. The function should return the sum of a, b, and c.

Python

def add_two_numbers(a, b, c=0):
    # Your code here

Need a hint?

Add c=0 in the function parameters and include c in the return sum.

3

Create a function with variable-length arguments

Write a new function called add_numbers that takes any number of arguments using *numbers. The function should return the sum of all numbers passed to it.

Python

def add_numbers(*numbers):
    # Your code here

Need a hint?

Use *numbers to accept any number of arguments and use the built-in sum() function to add them.

4

Print results using different argument types

Call add_two_numbers with two arguments 4 and 5, then with three arguments 4, 5, and 6. Also call add_numbers with 1, 2, 3, 4, and 5. Print each result on its own line.

Python

# Your code here

Need a hint?

Use print() to show the results of each function call.