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There is a close analogy between learning the English language and learning the C language. We start learning English by learning about alphabets, further create words and sentences by combining the words, Similarly, in C we learn about tokens which are the smallest individual unit in a program, they can either be a keyword or a string literal or, any identifier.

C Keywords

• Keywords are the words whose meaning has been explained already to the C compiler.
• The keywords cannot be used as variable names moreover if we do so, we are trying to assign a new meaning to the keyword.
• Keywords are also known as “reserved words”.
• There are only 32 keywords available 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

Example: In the below-given code int and return are the keywords.

int main()  
{  
    int a=5;  
    printf("Value of a is : %d",a);  
    return 0;  
} 

Note: Also read about C Programming Language & C Program – Structure. We shall see about identifiers in the next post.

Next: Identifiers in C

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