To help others better understand some particularly tricky piece of code, you can insert comments into the source program. Comments are simply informational attachments and have no significance for the assembler. Comments come in two forms: single-line comments and multi-line comments.

## Single-line comments

A single line comment is introduced either by single character ; or by the characters //.

##### Syntax

// character...
; character...

The assembler ignores all characters from the comment introducer to the end of the line. This type of comment is particularly good when you want to comment a single assembler line.

## Multi-line comments

A multi-line comment resembles a standard C comment as it is introduced by the characters /* and is terminated by */.

##### Syntax

/* character... */

Anything in between these delimiters is ignored by the assembler. You can use this type of comment to place large amounts of commentary, such as copyright notices or functional descriptions, into your code.