LEARN C PROGRAMMING

                                               C-PROGRAMMING



* C was developed at Bell Laboratories in 1972 by Dennis Ritchie. Many of its principles and ideas were taken from the earlier language B and B's earlier ancestors BCPL and CPL.

* C is a powerful general-purpose programming language. It is fast, portable and available in all platforms.


*  Benefits of C As a middle level language, C combines the features of both high level and low level languages. It can be used for low-level programming, such as scripting for drivers and kernels and it also supports functions of high level programming languages, such as scripting for software applications etc.

* if you are a new programmer , this platform is right choice to learn c language


*                    let's start with your first program ; HELLO WORLD !

#include <stdio.h>
int main()
{
    printf("Hello, World!\n");
    return 0;
}

*  role of header file in your program :

 You need to use libraries that are necessary to run the program. The stdio.h is a header file and C compiler knows the location of that file.every thing is already explaned in header file ,To use the file, you need to include it in your program using #include preprocessor.

* main() function 

#include<stdio.h>

int main(){

}

The code inside the curly braces { } is the body of main() function. The main() function is mandatory in every C program.

this program will not do anything but this is valid program.

* printf() function

 the printf( function is used as output. it shows output on screen ; like in our program it will show Hello, World! 

* return statement 

the return statement ends the program but its not mandatory to use.

Key notes to remember

• All C program starts from the main() function and it’s mandatory.
• You can use the required header file that’s necessary in the program. 
• C is case-sensitive; the use of uppercase letter and lowercase letter have different meanings.
• The statement in a C program ends with a semicolon.