C Programming Language Keywords

In this chapter you will learn about keywords. In C programming, keywords are reserved words that are part of the syntax.

C Programming Token

The smallest unit of C programming language is called token. There are three types of tokens in C programming and these tokens are used in all programs:

Character Set

A character set is a collection of valid alphabets, digits and special characteers used in C programs.

Alphabets

Upper Case: ABC…………………………………..XYZ

Lower Case: abc…………………………………..xyz

Digits

0 1 2 3 4 5 6 7 8 9

Special Characters

Special Characters used in C Programming

,	<	>	.	-
(	)	;	$	:
%	[	]	#	?
'	&	{	}	"
^	!	*	/	\|
-	\	~	+

White Space Characters

Blank space, new line, horizontal tab, carriage return and form feed.

C Programming Keyworkds

Keywords in programming are predefined are reserved words that carry special meaning. Since they are part or keyword syntax, they cannot be used a identifiers. For example:

				
					int age;

Here int is the keyword that specifies ‘age’ to be an integet type variable.

Since C programming is case-sensitive, all keywords must be written in lowercase letters. Here is the list of all ANSI supported keywords:

C Keywords

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

A part from these keywords, C programming language supports some more keywords based on the compiler.

All thsese keywords, their syntax and their usage are discussed in the keywords related topics. However, if you want to get a brief idea of these keywords without going ahead, you can visit the list of keywords in C programming page.