import os

def divideableBy3(number):
    "Check if passed number is divideable by three"
    # Use modulo to check if number is divideable by three
    divideable = (number % 3 == 0)

    # Return bool variable
    return divideable

# Clear screen
os.system("clear")  # Mac or Linux
# os.system("cls")  # Windows

# Prompt for input from user
# Use int to convert input to integer
number = int(input("Input a number: "))

# Call function divideableBy3 and test return value (bool)
if divideableBy3(number):
    print("{} is divideable by 3".format(number))
else:
    print("{} is not divideable by 3".format(number))