Error handling by raising an error

Another way to raise an error is by using raise. In this exercise, you will add a raise statement to the shout_echo() function you defined before to raise an error message when the value supplied by the user to the echo argument is less than 0.

The call to shout_echo() uses valid argument values. To test and see how the raise statement works, simply change the value for the echo argument to a negative value. Don't forget to change it back to valid values to move on to the next exercise!

Deze oefening maakt deel uit van de cursus

Introduction to Functions in Python

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Oefeninstructies

Complete the if statement by checking if the value of echo is less than 0.
In the body of the if statement, add a raise statement that raises a ValueError with message 'echo must be greater than or equal to 0' when the value supplied by the user to echo is less than 0.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Define shout_echo
def shout_echo(word1, echo=1):
    """Concatenate echo copies of word1 and three
    exclamation marks at the end of the string."""

    # Raise an error with raise
    if ____:
        ____ ____(____)

    # Concatenate echo copies of word1 using *: echo_word
    echo_word = word1 * echo

    # Concatenate '!!!' to echo_word: shout_word
    shout_word = echo_word + '!!!'

    # Return shout_word
    return shout_word

# Call shout_echo
shout_echo("particle", echo=5)

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