introduction to c language helps to know about the c langugaeg

introduction to c

1. C LANGUAGE

2. Introduction Derived from B basic C  is a procedural programming language initially developed by  Dennis Ritchie  in the year  1972  at Bell Laboratories of AT&T Labs . It was mainly developed as a system programming language to write the  UNIX operating system . General Purpose and Portable Low-level Memory Access Clean Syntax

3. Structure of a c language Documentation section/comment section //single line// /* milti -line*/ Header file section/ linking section Definition section Global declaration section Main section { Declaration part Execution part }

4. Syntax #include< stdio.h > preprocessot directive(Header file) Main() main function { Statement1; Statement2; program statement return 0; g etch () }

5. Data types There are three types of data types in c Int ( used to store any number including positive, negative and zero without decimal part) Declaration: int %d Float( used to store numbers with decimal point ) Declarion:float %f Char( used to declare character data type ) Declarion:char %c Variables are declared before they are used in program.

6. Example //program to add the given two numbers// #include< stdio.h > Main() { Int a,b,c ; Printf (“enter a b values”); Scanf (“% d%d ”,& a,&b ); C= a+b ; Printf (“ the result is % d”,c ); r eturn 0; }