Comments in C language are used to provide information about lines of code. It is widely used for documenting code. There are 2 types of comments in the C language.

1. Single Line Comments
2. Multi-Line Comments

Single Line Comments

Single line comments are represented by double slash \\. Let's see an example of a single line comment in C.

1. #include<stdio.h>    
2. int main(){    
3.     //printing information    
4.     printf("Hello C");    
5. return 0;  
6. }      

Output:

Hello C

Even you can place the comment after the statement. For example:

1. printf("Hello C");//printing information  

Mult Line Comments

Multi-Line comments are represented by slash asterisk \* ... *\. It can occupy many lines of code, but it can't be nested. Syntax:

1. /*  
2. code 
3. to be commented 
4. */  

Let's see an example of a multi-Line comment in C.

1. #include<stdio.h>    
2. int main(){    
3.     /*printing information   
4.       Multi-Line Comment*/  
5.     printf("Hello C");    
6. return 0;  
7. }       

Output:

Hello C