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Comments
 

Comments are explanatory information that you can include in a program to benefit the reader of your code. The compiler ignores comments, so they have no affect on a program.
A comment starts with a slash asterisk /* and ends with an asterisk slash */ and can be anywhere in your code.
Comments can be on the same line as a statement, or they can span several lines.
For example: 

#include <stdio.h>

/* A simple C program
*  Version 1.0
*/
int main() {
  /* Output a string */
  printf(“Hello World!”);
  return 0;

 

NOTE!
As you can see, comments clarify the program’s intent to the reader. Use comments to clarify the purpose and logic behind segments of code.

Single-line Comments
 

C++ introduced a double slash comment // as a way to comment single lines. Some C compilers also support this comment style.
For example:

#include <stdio.h>

int main() {
  int x = 42; //int for a whole number
   
  //%d is replaced by x
  printf(“%d”, x);
   
  return 0;

 

NOTE!
Adding comments to your code is good programming practice. It facilitates a clear understanding of the code for you and for others who read it.

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