exceptiontests.py

# This command-line test gets an input from the user and
# attempts to square it. If there are no issues it
# prints the result of squaring the input. If the input
# is not an integer a ValueError is raised which triggers
# the 'except' which prints the issue to the user. If another
# exception occurs it will not be caught and will terminate the
# program and print the error message to the console.

while True:
    val = input("Enter a number to square: ")
    try:
        squared = int(val) ** 2
        print("You number squared: ", squared)
    except ValueError:
        print("Number must be an integer.")