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Exercise 2

Write a function, even_or_odd, that determines whether its argument is an even or odd number. If it's even, the function should print 'even'; otherwise, it should print 'odd'. Assume the argument is always an integer.

A number is even if you can divide it by two with no remainder. For instance, 4 is even since 4 divided by 2 has no remainder. Conversely, 3 is odd since 3 divided by 2 has a remainder of 1.

To determine the remainder, you can use the % modulo operator shown in The Basics chapter.

Solution

def even_or_odd(number):
    if number % 2 == 0:
        print('even')
    else:
        print('odd')

def even_or_odd(number):
    print('even' if number % 2 == 0 else 'odd')

The solutions use the modulo operator (%) to determine whether the number is even. If the result of number % 2 is 0, the number is even.

The second solution shows the equivalent solution using a ternary expression. The author isn't sure whether this is more readable than the first solution.

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