Keywords & Comments

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 Keywords

Keywords are predefined, reserved words used in programming that have special meanings to the compiler. Keywords are part of the syntax and they cannot be used as an identifier.

For example:

int money;

Here, int is a keyword that indicates money is a variable of type int (integer).

A list of 32 keywords in the c language is given below:

C Keywords

auto	double	int	struct
break	else	long	switch
case	enum	register	typedef
char	extern	return	union
continue	for	signed	void
do	if	static	while
default	goto	sizeof	volatile
const	float	short	unsigned

        

Comments

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

1)Single Line Comments

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

#include<stdio.h>    

int main(){    

    //codesikhe.blogspot.com   

    printf("Hello C");    

return 0;  

}      

Output

Hello C

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

(2) Multi Line Comments

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

/*  

code

to be commented

*/  

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

#include<stdio.h>    

int main(){    

    /*printing information  

      Multi-Line Comment*/  

    printf("Hello C");    

return 0;  

}      

Output

Hello C