Welcome to Raspberry Pi 4B repository

Step 1:Create a file to store the project

mkdir C

Step 2:Enter this folder

cd C/

Step 3:Create and open helloworld.c file.

nano helloworld.c

Step 4: Writing code

#include<stdio.h>
int main()
{
printf("Hello World!n");
while(1)
{

}
return 0;
}

After writing, press Ctrl + X to exit this file.

The system will prompt you whether you need to save, press Y to save and exit.

Step 5: Compile this .c file.

gcc helloworld.c -o helloworld -lwiringPi

Step 6: Run this code

./helloworld

As shown below.

As can be seen from the above figure, after running the program, the Raspberry Pi command terminal will successfully printed out "Hello World!".