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It is common for new programmers to write code like the following:
def is_even(num):
 """ (int) -> bool
 Return whether num is even.
 """
 if num % 2 == 0:
 return True
 else:
 return False
This works, but is stylistically questionable. It's also more typing and
reading than is necessary!
num % 2 == 0 already produces True or False, so that expression can be used with the return statement:
def is_even(num):
 """ (int) -> bool
 Return whether num is even.
 """
 return num % 2 == 0
Jennifer Campbell • Paul Gries
University of Toronto
5.4
Remembering the Results
of a Boolean Expression
Evaluation (not a perfect
match, but it didn't fit
better elsewhere)
Optional reading
09/10/2024, 22:28 No if Required
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https://www.coursera.org/learn/learn-to-program/resources/oTgXi