There are two kinds of documents in a program: the code that creates the program itself, and the text that accompanies the code.

Comments are non-executable and optional parts of a program that describe the code.

Remarks are optional in programs. Regardless of whether there are comments in a prepared program or not, it will certainly function according to its code. Comments contribute a great deal to understanding the program code. There are both multi-line and one-line comments. The term "one-line comment" describes any series of characters on the very same line after a dual lowercase (//). (//). character (//). A multi-line comment is started by/ * as well as ended by/ *.