Comments in Python

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Comments in Python#

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Comments in Python are relatively simple. There is just one way to create comments. When a pound symbol (#) appears outside of a string, then everything to the right of the symbol in the given line is treated as a comment.

x = 5 # Assign the value 5 to x
#      ^^^^^^^^^^^^^^^^^^^^^^^^
# Code comment

Normally, there is no way to create a comment spanning over multiple lines, such as in C/C++/Java with

/*
    This is a comment
    This is also a comment
    And this is also a comment
*/

Therefore one would have to comment out the lines individually in Python.

#   This is a comment
#   This is also a comment
#   And this is also a comment

To make it a little bit simpler, it is possible to treat the content to be commented out, as a string without any assignment. Since the string is not assigned, it will just be ignored. A string spanning over multiple lines can be created using so-called “triple quotes”, which refers to three sequential double quotes.

Exercise#

Now it is your turn! Please modify the below program WITHOUT removing code or moving it to a different spot, so that the program outputs “Hello World!”. You are allowed to use triple quotes (”””).

my_output = "Hello World!"

my_output = 0

for i in range(1, 100+1):
    
    my_output += i

print(my_output)

5050

Solution

my_output = "Hello World!"
"""
my_output = 0

for i in range(1, 100+1):
    
    my_output += i
"""
print(my_output)
# --> "Hello World!"
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