Comments in C++
How to Write Comments in C++
Generally Comments are used to provide the description about the Logic written in program. Comments are not display on output screen.
When we are used the comments, then that specific part will be ignored by compiler.
In 'C++' language two types of comments are possible
- Single line comments
- Multiple line comments
Single line comments
Single line comments can be provided by using / /....................
Multiple line comments
Multiple line comments can be provided by using /*......................*/
Note: When we are working with the multiple line comments then nested comments are not possible.
Rules for Writing Comments
1. Program contains any number of comments at any place.
Example
// header files
#include<iostream.h>
#include<conio.h>
void main()
{
// variable declaration
int a,b,c;
a=10;
b=20;
c=a+b;
cout<<"Sum: "<<c;
getch();
}
2. Nested Comments are not possible, that means comments within comments.
Example
void main()
{
/*
/* comments */
*/
}
3. Comments can be splits over more than one line.
Example
void main()
{
/* main
function
body part
*/
}
4. Comments are not case sensitive.
Example
void main()
{
/* MAIN Function BODY */
}
5. Single line comments start with "//"