TELLING ABOUT SIMPLE PROGRAM IN C LANGUAGE e.g HELLO WORLD

One thing keeps always in your mind if you donot question  on any topic it means that you don't know very well on that topic .Same thing happen with computer . Computer asks question to us while programming.We will have to understand their feeling. I know, computer doesn't have feeling but we will have to understand according to him then we will have to control over it . 

        " IRON CUTS IRON"   

1.         #include<stdio.h> //# is a preprocessor directives which tell us to include header file from library accoring to their needs .<stdio.h> have printf data types.                                        //like as #include<conio.h> it has "clrscr()"
2. "void main()" is a function which is used for starting the program so at least one function is compulsory .
3. printf is used for input or output 
4. getch() is used for getting all character from program but some people says it is also used for holding the screen.