Python Functions Practice Questions with Solutions

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Functions help you organize your code into reusable blocks. Instead of writing the same code multiple times, you can create a function once and call it whenever needed. In this practice set, you’ll learn how to create functions, pass arguments, return values, use default parameters, and solve beginner-friendly Python programs. Python functions practice questions with solutions help to understand the concept

1. Python Program to Create and Call a Function

Difficulty: Foundation

Problem Statement

Write a Python function that prints “Welcome to CodeMantra!” and call it.

Python Solution

def welcome():
    print("Welcome to CodeMantra!")

welcome()

Sample Output

Welcome to CodeMantra!

Explanation

A function is created using the def keyword and executed by calling its name.

Concepts Covered

  • Function
  • def keyword
  • Function Call

2. Python Program to Add Two Numbers Using a Function

Difficulty: Foundation

Problem Statement

Write a Python function that accepts two numbers and prints their sum.

Python Solution

def add_numbers(num1, num2):
    print("Sum:", num1 + num2)

add_numbers(15, 25)

Sample Output

Sum: 40

Explanation

Function parameters receive values passed during the function call.

Concepts Covered

  • Function Parameters
  • Function Arguments

3. Python Program to Find the Square of a Number Using a Function

Difficulty: Foundation

Problem Statement

Write a Python function that returns the square of a number.

Python Solution

def square(number):
    return number * number

result = square(8)

print(result)

Sample Output

64

Explanation

The return statement sends a value back to the function call.

Concepts Covered

  • return Statement

4. Python Program to Check Whether a Number is Even or Odd Using a Function

Difficulty: Foundation

Problem Statement

Write a Python function that checks whether a number is even or odd.

Python Solution

def check_even_odd(number):
    if number % 2 == 0:
        return "Even"
    else:
        return "Odd"

print(check_even_odd(27))

Sample Output

Odd

Explanation

Functions can return different values based on conditions.

Concepts Covered

  • if…else
  • return

5. Python Program to Find the Largest of Three Numbers Using a Function

Difficulty: Practice

Problem Statement

Write a Python function that returns the largest among three numbers.

Python Solution

def largest(a, b, c):
    return max(a, b, c)

print(largest(25, 80, 45))

Sample Output

80

Explanation

The built-in max() function returns the largest value.

Concepts Covered

  • max()
  • Function Return Value

6. Python Program to Calculate the Factorial of a Number Using a Function

Difficulty: Practice

Problem Statement

Write a Python function to calculate the factorial of a number.

Python Solution

def factorial(number):
    result = 1

    for i in range(1, number + 1):
        result *= i

    return result

print(factorial(5))

Sample Output

120

Explanation

The function multiplies numbers from 1 to the given number.

Concepts Covered

  • for Loop
  • Functions

7. Python Program to Use Default Function Arguments

Difficulty: Practice

Problem Statement

Write a Python function that greets a user. If no name is provided, print “Guest”.

Python Solution

def greet(name="Guest"):
    print("Welcome", name)

greet()
greet("Rahul")

Sample Output

Welcome Guest
Welcome Rahul

Explanation

Default arguments are used when no value is passed during the function call.

Concepts Covered

  • Default Arguments

8. Python Program to Return Multiple Values from a Function

Difficulty: Challenge

Problem Statement

Write a Python function that returns both the sum and product of two numbers.

Python Solution

def calculate(a, b):
    return a + b, a * b

sum_value, product = calculate(5, 10)

print("Sum:", sum_value)
print("Product:", product)

Sample Output

Sum: 15
Product: 50

Explanation

Python functions can return multiple values as a tuple.

Concepts Covered

  • Multiple Return Values

9. Python Program to Calculate the Average of Numbers Using a Function

Difficulty: Challenge

Problem Statement

Write a Python function that accepts three numbers and returns their average.

Python Solution

def average(a, b, c):
    return (a + b + c) / 3

print(average(20, 30, 40))

Sample Output

30.0

Explanation

The function calculates the average and returns the result.

Concepts Covered

  • Function Parameters
  • Arithmetic Operations

10. Python Program to Find Whether a Number is Positive or Negative Using a Function

Difficulty: Challenge

Problem Statement

Write a Python function that returns whether a number is positive, negative, or zero.

Python Solution

def check_number(number):
    if number > 0:
        return "Positive"
    elif number < 0:
        return "Negative"
    else:
        return "Zero"

print(check_number(-15))

Sample Output

Negative

Explanation

The function uses conditional statements to determine the type of number.

Concepts Covered

  • Functions
  • if…elif…else
  • return Statement

Chapter Summary

After completing this chapter, you have learned:

  • Creating functions
  • Calling functions
  • Function parameters
  • Function arguments
  • Return statement
  • Default arguments
  • Multiple return values
  • Using functions with loops
  • Using functions with conditions
  • Writing reusable Python code

Written by Shubhranshu Shekhar, who has trained 20000+ students in coding.

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