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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.