exercise 2:

# Exercise 2: Check whether a number is even or odd
def check_even_odd(number):
    if number % 2 == 0:
        print("The number is even.")
    else:
        print("The number is odd.")

# Example 1
number = 13
check_even_odd(number)

# Example 2
number = 20
check_even_odd(number)