C - Language Overview
C is a general purpose high level language that was originally developed by Dennis M. Ritchie to develop the Unix operating system at Bell Labs. C was originally first implemented on the DEC PDP-11 computer in 1972.
In 1978, Brian Kernighan and Dennis Ritchie produced the first publicly available description of C, now known as the K&R standard.
The UNIX operating system, the C compiler, and essentially all UNIX applications programs have been written in C. The C has now become a widely used professional language for various reasons.
Easy to learn
It produces efficient programs.
It can handle low-level activities.
It can be compiled on a variety of computer platforms.
Facts about C
C was invented to write an operating system called UNIX.
C is a successor of B language which was introduced around 1970
The language was formalized in 1988 by the American National Standard Institute (ANSI).
The UNIX OS was totally written in C By 1973.
Today C is the most widely used and popular System Programming Language.
Most of the state of the art software's have been implemented using C.
Today's most popular Linux OS and RBDMS MySQL have been written in C.
Why to use C ?
C was initially used for system development work, in particular the programs that make-up the operating system. C was adopted as a system development language because it produces code that runs nearly as fast as code written in assembly language. Some examples of the use of C might be:
A C program can vary from 3 lines to millions of lines and it should be written into one or more text files with extension ".c" for example hello.c. You can use "vi", "vim" or any other text editor to write your C program into a file.
This tutorial assumes that you know how to edit a text file and how to write source code inside a program file.