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!