Reserved Words (Keywords) in C

                 

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

Important points to remember

• C is case sensitive.
• All keywords and Standard Library functions are in lowercase.
• These reserved keywords cann’t be used as variable or function name of C program.