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Start your free trialAngelus Miculek
6,474 Pointswhat does return do?
Not sure I'm getting this straight, but the purpose of the return is so the variable can store it? The variable would be empty if that value wasn't returned? Could someone explain this, thanks.
2 Answers
Travis Alstrand
Treehouse Project ReviewerYes Angelus Miculek , you're on the right track!
In Python (and in many other programming languages), the purpose of the return
statement is to send a value back to the part of the program that called the function. If a function doesn't return a value, it doesn't send any output back, and the variable calling it would be empty (or None
, which is Python's equivalent of "no value").
Hereβs an example:
def add_numbers(a, b):
return a + b # Returns the sum of a and b
result = add_numbers(3, 4) # result will store the value 7
print(result) # This will print 7
In this case, the function add_numbers
returns the result of a + b
. The variable result
stores this returned value. If there were no return statement, result would not store anything useful:
def add_numbers(a, b):
a + b # No return statement
result = add_numbers(3, 4) # result will be None
print(result) # This will print None
Without return
, the function still performs the operation a + b
, but it doesnβt send the result back, so the calling code doesn't have access to it. That's why the return
statement is crucial when you want a function to pass a result back to the part of the code that called it.
I hope that helps it make sense π
Angelus Miculek
6,474 PointsYes very good, thanks!