Introduction of C-programming

C is a programming language. C is one of the oldest language.

What is C-programming?

C is a programming language. C is one of the oldest language.

C-programming was developed by Dennis Ritchie at AT & T's Bell Labs, USA in 1972.

Uses of C-programming

C language is used to program a wide variety of systems, some of the uses of c are as follows

• C-programming is used to write driver programs for devices like tablets, printers etc.
• C-programming is used to develop games.
• C-programming is used to program embedded systems where programs needs to run faster in limited memory(microwave, cameras etc).
• Major parts of linux and other operating systems are written in C-programming.

What is Variables?

A variable is a container which stores a value. It is name of memory location, which is used to store value.
Example:-
int x=2;
float y=3.5;
char letter='s';
char name[20]="Soopro Pathshala";

Rules for naming variables in c programming.

• First character must be an alphabet or underscore(_).
• No commas, blanks allowed.
• Variables names are case sensitive. We must crate meaningful variables name in our programs.
• No special symbol other that (_) allowed.

Keywords

Keywords are reserved words, whose meaning is already known to the compiler. There are 32 keywords available in c.

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

Key Points

• printf() function in c is used to print some information or value.
• scanf() function in c is used to accept user input.

Comments

comments are used to clarify something about the program in plain languagqe.

There are two types of comments in C-programming.

• Single line comment.
• Multi line comment.

C-programming rules

There are some rules which are applicable to all the C-programming.

• Every program's execution starts from main() function
• C-programming is case sensitive language.
• All the statements are terminated with a semicolon.
• Instructions are executed in the same order in which they are written.