A C++ comment is a piece of descriptive text which explains some aspect of a program. The compiler totally ignores the program comment and are only intended for programmers or readers. There are two ways of writing comments.
- // line comment
- /* block comment */
The first one that is, the line comment, ignores everything from where the pair of slash sign(//) starts to the end of the line. The second one, the block comment, ignores everything between the start of the /* and to the end of the */. The second block comment may consist of a single line of comment or block of comment.
Syntax:
1 2 | // comment /* comment */ |
Example:
1 2 3 | // This is a comment /* This is a line of comment. It can be of two or more lines. */ |
A C++ program that shows the use of comment using // line comment:
1 2 3 4 5 6 | #include<iostream.h> int main() { cout<<"Hello World"; //Displays Hello World return 0; } |
The output of the above program is:
A C++ program that shows the use of comment using /* block comment */:
1 2 3 4 5 6 7 8 9 | /* This is a program in C++ that shows the example of block of comments */ #include<iostream.h> int main() { cout<<"Second Program"; return 0; } |
The output of the above program is:
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