2.1.2

Comments

Test yourself

Comments

Comments are lines of code that are ignored completely by the computer.

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What are comments?

  • A comment is a line of code that is completely ignored by the computer.
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Purpose of comments

  • Comments can be used to add description to your code to make it easier for other people to understand.
  • They can also be used to leave notes and reminders to yourself as you work on a complex program.
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How to comment

  • To write a comment in most languages, you must use a special character which tells the computer to ignore the rest of the line:
    • In Python, that character is a #.
    • In C-style languages it is //.
  • The exact character depends on the language being used.

Jump to other topics

1Computational Thinking & Algorithms

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