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C# Comments


C# Comments

Comments can be used to explain C# code, and to make it more readable. It can also be used to prevent execution when testing alternative code.


Single-line Comments

Single-line comments start with two forward slashes (//).

Any text between // and the end of the line is ignored by C# (will not be executed).

This example uses a single-line comment before a line of code:

Example

// This is a comment
Console.WriteLine("Hello World!");

Try it Yourself »

This example uses a single-line comment at the end of a line of code:

Example

Console.WriteLine("Hello World!");  // This is a comment

Try it Yourself »


C# Multi-line Comments

Multi-line comments start with /* and ends with */.

Any text between /* and */ will be ignored by C#.

This example uses a multi-line comment (a comment block) to explain the code:

Example

/* The code below will print the words Hello World
to the screen, and it is amazing */
Console.WriteLine("Hello World!"); 

Try it Yourself »

Single or multi-line comments?

It is up to you which you want to use. Normally, we use // for short comments, and /* */ for longer.


C# Exercises

Test Yourself With Exercises

Exercise:

Insert the missing parts to create two types of comments.

 This is a single-line comment
 This is a multi-line comment 

Start the Exercise