Characteristics of C Programming

There are 6 characteristics:

• Keywords
• Operators
• Separators
• Constant
• Predefined Functions
• Syntax

Keywords

• Keywords are words that have special meaning to the C compiler.
• An identifier can't have the same spelling and case as a C keyword. We can't use keywords for our own purposes.
• There are a total of 32 keywords in C which are as follows:

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

Operators

• Special types of symbols i.e. are used to perform specific task
• Types: Binary operator, Unary operator, Ternary operator, etc.
• Total 44 operators are present

Separators:

• Separate things called as a token
• we can separate individual unit -> token

What is Token

The smallest unit of c programming is known as a token. Token can be any keyword, operator, separator, constant, identifier, etc. We can give any number of spaces between tokens.

Constant

• Variable that doesn't change its value throughout the program is known as a constant.
• Types:
  • Alphanumeric constants -> a-z, A-z, 0-9
  • Numeric constants -> 0-9

Predefined Function

• all predefined functions are stored in respective header files.
• e.g.
  • stdio.h -> printf(), scanf(), ...
  • math.h -> sqrt(), ...

Syntax

• Syntax is the rules which need to be followed while developing a program
• e.g. To declare variable syntax is - data_type variable_name ;

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