Ironically, an essential tool in programming is the ability to tell a computer to ignore a part of a program. Text written in a program but not run by the computer is called a comment. In C#, anything after a // or between /* and */ is a comment. In spoken word we call these symbols “forward slashes” and “asterisks”.

Comments can:

  • Provide context for why something is written the way it is:

    /* This variable will be used to count the number of times anyone tweets the word persnickety */ int persnicketyCount = 0;
  • Help other people reading the code understand it faster:

    /* Calculates tomorrow's rain likelihood as a number between 0 and 100 */ ComplicatedRainCalculationForTomorrow();
  • Ignore a line of code and see how a program will run without it:

    // string usefulValue = OldSloppyCode(); string usefulValue = NewCleanCode();

Developers tend to use // for short, one-line comments and /* */ for anything longer, but the choice is up to you!



Add a comment to the code right above the first Console.WriteLine().

The comment should explain what this program does.

Take this course for free

Mini Info Outline Icon
By signing up for Codecademy, you agree to Codecademy's Terms of Service & Privacy Policy.

Or sign up using:

Already have an account?