How To Make Simple Hello Program With Explanation

//Program to print “Hello” with the meaning of each word

1. #include<stdio.h> 2. #include<conio.h> 3. void main() 4. { 5. clrscr(); 6. printf("Hello"); 7. getch(); 8. }

Explanation:-

In this Program, we used some terms that are used in almost every program of C.

Let understand the meaning of these terms.

1.  #include<stdio.h>

#include →

Is a preprocessor directive (here it is used for File Inclusion.  Hence, it is called as file inclusion preprocessor directive.)

         

stdio.h →

Is the name of standard input/output header file (.h extension  represent that it is a header file.)

2.  #include<conio.h>

conio.h →

Is a console input output header file. It manage the console i/o  functions. Such as- printf is used to display output on the  screen. And, scanf is used to read input from the user.

3.  void main()

         

void →

Is the data type. It does not return any value.  Instead of void, we can also write 'int' but int return value. So,  we have to write 'return 0;' before 'getch();' 0 indicates success.

         

main() →

Represents a function. All statements that belong to program are  written inside the main function.

4.  {}
         

{} →	The statements written inside the main() function are enclosed  within a pair of braces {}.

5.  clrscr();

clrscr() →

Is used to clear the output screen.

; →	Is used to terminate a statement.

6.  printf("Hello");
        

printf("Hello") →

Is used to display output on the screen. This command displays  'Hello'.

7.  getch();
       

getch() →

It accepts a character from user. Thus, it helps to the user to see  output by waiting to enter a character from keyboard.