C language Hello world Program

#include <stdio.h>
#include <conio.h>

int main()
{
printf("Hello world!n");
getch();
return 0;
}

every program includes following sections

• Some header files
• Some pre-defined function
• Return statement

1. #include <stdio.h>  – This is a header file, it includes standard input and output library functions. The prints() pre-defined function  that is defined in this header file.

2. #include <conio.h>  – This is a header file, it includes console input and output library functions. The getch() pre-defined function is defined in this header file.

3. #include <stdlib.h> –  This is a header file, it includes some standard library functions.

4. void main() –  This is the main function in C Language. The void is returned as a statement as void never returns value main() in the main method. It is an indication for starting the program execution. So maint is an entry Point to every C program.

5. print() – It is a pre-defined function for display output. This function definition includes the   #include <stdio.h> header file

6. return 0; – This is the ending point to every C Program.

How to run and compile the C Program in code:: block

Write the C Program in the Code block

Two ways that are available to execute the C program

1. Go to menu bar and then click on “build menu” and then select “Build and run”
2. Click F9 key in the keyboard

 

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