What Is Comment In C Language?
A comment is an explanation or description of the source code of the program. It helps a developer explain logic of the code and improves program readability. At run-time, a comment is ignored by the compiler.
There are two types of comments in C:
1) A comment that starts with a slash asterisk /* and finishes with an asterisk slash */ and you can place it anywhere in your code, on the same line or several lines.
2) Single-line Comments which uses a double slash // dedicated to comment single lines
Example Single Line Comment
// single line comment example
Here is an example of comments type
// C program to demo
// Single Line comment
#include <stdio.h>
int main(void)
{
// This is a single line comment
printf("Guru99");
return 0; // return zero
}
Example Multi Line Comment
/* Sample Multiline Comment Line 1 Line 2 …. … */
Example Multi Line Comment
#include <stdio.h>
int main() {
/* in main function
I can write my principal code
And this in several comments line */
int x = 42; //x is a integer variable
printf("%d", x);
return 0;} Why do you need comments?
A good programmer who writes codes understood by a human is better than a programmer who generates codes understood only by the machine.
So, it is highly recommended to insert comments to your code because it is good programming practice. Comments do not affect a program because the compiler ignores them.
Comments help the developer understand the logic/algorithm of the code if he revisits it after a long time.
