A function that greets a person:

 

def greet(name):
    return f"Hello, {name}! How are you?"
message = greet("John")
print(message)  # Output: Hello, John! How are you?

 
OUTPUT


 

  A function that checks if a number is even:

 

def is_even(number):
    return number % 2 == 0
print(is_even(10))  # Output: True
print(is_even(7))   # Output: False

 
OUTPUT


 

  A function that calculates the factorial of a number:

 

def factorial(n):
    if n == 0:
        return 1
    else:
        return n * factorial(n - 1)
print(factorial(5))  # Output: 120 (5! = 5 * 4 * 3 * 2 * 1 = 120)

 
OUTPUT


 

  The letter "f" before the string is used to create an f-string (formatted string literal) in Python. 

 

num1 = 5
num2 = 3
ans = num1 + num2
# Using f-string to format the string
print(f"The addition of {num1} and {num2} results {ans}.")

 
OUTPUT