comments-in-c++

endl

endl is stand for end of line.
It is used to end the line and start from new line.

Example :

#include <iostream>
using namespace std;

int main() {

   cout<<"Good Evening"<<endl;
   cout<<"Hello Students";
   return 0;

}

Output :

Good Evening
Hello Students

Explanation :

In a Line no 6 print message of Good Evening using cout, and use endl for end of line .
In a Line no 7 print message of Hello Students using cout.

Comments in C++

* compiler ---> ignore

* programmer ---> redability

Two Types of Comments :

1. single line comments
   // This is sample program
   • Single-line comments start with two forward slashes(//).
   • Any text between (//) and the end of the line is ignored by the compiler.

2. multiple line comments
   /* ------- */
   • Multi-line comments start with /* and ends with */.
   • Any text between (/*) and (*/) will be ignored by the compiler.

1. Single Line Comment :

Example :

#include <iostream>
using namespace std;

int main() {

   // This is sample program
   cout<<"Good Evening"<<endl;
   cout<<"Hello Students";
   return 0;

}

Output :

Good Evening
Hello Students

Explanation :

In a Line no 6 we add comment and this comment ignored by the compiler.
In a Line no 7 print message of Good Evening using cout, and use endl for end of line .
In a Line no 8 print message of Hello Students using cout.

2. Multiple Line Comment :

Example :

#include <iostream>
using namespace std;

int main() {

   /*
    This is sample program
    in this program we print two message
    1. good evening
    2. hello students
    */
   cout<<"Good Evening"<<endl;
   cout<<"Hello Students";
   return 0;

}

Output :

Good Evening
Hello Students

Explanation :

In a Line no 6 we add multiline comment /* this all text are ignored by complier up to line no 11 */
In a Line no 12 print message of Good Evening using cout, and use endl for end of line .
In a Line no 13 print message of Hello Students using cout.