![]() ![]() # If user types another key, run the function againĬomments are made to help programmers, whether it is the original programmer or someone else using or collaborating on the project. # If user types N, say good-bye to the user and end the program # If user types Y, run the calculate() function # Define again() function to ask user if they want to use the calculator again In a “Hello, World!” program, a comment may look like this: ![]() Comments are in the source code for humans to read, not for computers to execute. ![]() Generally, comments will look something like this: # This is a commentīecause comments do not execute, when you run a program you will not see any indication of the comment there. Then you can copy, paste, or edit the examples by adding them after the > prompt. Info: To follow along with the example code in this tutorial, open a Python interactive shell on your local system by running the python3 command. If you don’t have a programming environment set up, you can refer to the installation and setup guides for a local programming environment or for a programming environment on your server appropriate for your operating system (Ubuntu, CentOS, Debian, etc.) Comment SyntaxĬomments in Python begin with a hash mark ( #) and whitespace character and continue to the end of the line. You should have Python 3 installed and a programming environment set up on your computer or server. ![]() In general, it is a good idea to write comments while you are writing or updating a program as it is easy to forget your thought process later on, and comments written later may be less useful in the long term. Using comments in programs can make code more readable for humans, as it provides some information or explanation about what each part of a program is doing.ĭepending on the purpose of your program, comments can serve as notes to yourself or reminders, or they can be written with the intention of other programmers being able to understand what your code is doing. Comments are lines that exist in computer programs that are ignored by compilers and interpreters. ![]()
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