C Language

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C - Language Theory

Introduction

Dennis Ritchie - 1941 - 2011
C is a general-purpose, procedural programming language. It is fast, portable and available in all platforms. It was developed at AT & T’s Bell Laboratories of USA in 1972 by Dennis Ritchie. It was mainly developed as a system programming language to write an operating system. Like syntax of Java, PHP, JavaScript, and many other languages are mainly based on C language. It is low level programming language close to machine level language. It is widely used in the software development field.

History of C language

The base or father of programming languages is 'ALGOL.' It was first introduced in 1960. 'ALGOL' was used on a large basis in European countries. 'ALGOL' introduced the concept of structured programming to the developer community. In 1967, a new computer programming language was announced called as 'BCPL' which stands for Basic Combined Programming Language.

Structure of C program


#include <stdio.h>
int main()
{
//Statements
 }

Example program :


#include <stdio.h>
int main()
{
printf("Hello");
return 0;
 }

Applications

  1. It is used for developing system applications.
  2. It is widely used in embedded systems and desktop applications.
  3. It is used for developing desktop as well as mobile phone's operating system.

Keywords

There are only 32 keywords available in 'C'

AutoDoubleIntTypedef
BreakIfLongReturn
CaseElseRegisterUnion
CharEnumShortUnsigned
ConstExternSignedVoid
ContinueFloatStaticSizeof
DefaultForStructVolatile
DoGotoSwitchWhile