Comments

1. Comments should be placed at key places in a program to make the steps clearer to you and to others.
   
   
2. The double forward slashes // are used to denote the start of a comment. The compiler ignores the text between the // and the end of the line.
   
   For example,
   
   // Declaration of variables:
   
   int score,           // variable for the exam score
         count = 0;    // variable to count the number of students
   
   
3. Comments spanning more than a line can be included by enclosing the text by the symbol pair /* and */.
   
   For example,
   
   /* This is an example where the comments span
       more than a single line. This feature can be used
       during the debugging stage to temporarily omit
       certain blocks of code from a program.*/