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Michael Otu
Michael Otu

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Python3 programming - Exercise 3 - More on data types and comments

More on data types and comments

There are other data types other than those mentioned earlier in Exercise 2 (Data Types). We shall discuss the boolean data type.

This data type can only be True or False. Boolean values are generated when values are compared or when there is a condition. Eg 1 < 2 is True, 1 > 2 is False .


is_online = True
is_swift = True
is_human = False
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Boolean values are case sensitive. Upper-case T for True and F for False , in python.


A comment is a piece of text that mostly should tell why or what we are trying to achieve. The # symbol, placed ( inserted) at the beginning of the line, comments the line ( the line is ignored by the interpreter).


# Hello world program
# Display Hello world for the user to see
# Using the print function
print("Hello world")
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The first three lines starting with # are comments. A comment is ignored during execution. You can also comment out some lines during debugging.


Whatever that comes after the # would be ignored.
print('hello world') # greetings , greetings would be ignored.


  1. In Exercise 2 (Data Types), add comments to your solutions to give the why/what the line is doing or meant to do ( remember that not all lines need a comment if the code is descriptive itself).

    • How many comments are there in the code below?
    • Which line numbers, would be displayed and why? practicals


  • A boolean value is True or False.
  • These values are generated during the comparison of two or more values.
  • A comment is supposed to explain, "the" what or why in the code ( line)
  • We can also use it to state how we want to reach our solution
  • Use # to create a comment

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