Comment in c++

Comment in c++:

                                          Comments are the part of source code. Comments are for the programmer not for compiler. Anything in the comments ignore the compiler do not run . the purpose of comments inserts description within the source code. The comments could be line by line or whole block.

 Line by line comment

                                                   It starts from pair of slash sign(//),discards everything from where the pair of slash signs (//) is found up to the end of that same line.              

For example.

                     Int a=2;    // variable a is declare by integer type which is initialize by value 2 

   

Here   “ int a=2;” is the instruction which is run by compiler and  “// variable a is declare by integer type which is initialize by value 2” is comment which will be ignore by compiler.

Block comments:

                            Discards everything between the /*characters and the first appearance of the */ characters, with the possibility of including more than one line.

For example:

 /* my second program in C++ with more comments

 my name is umer and I am owner of                                programminglogic.net */

#include <iostream>

using namespace std;

int main ()

{

Int a=2;    // variable a is declare by integer type which is initialize by value 2 

……………….

………….

………………

}

Note:

            If you include comments within the source code of your programs without using the comment characters combinations //, /* or */, then compiler will take it as c++ code and it will generate the error.