• Source
    1. #include <stdio.h> // Import the Standard Input Output library
    2.  
    3. int // GCC compiler require main() to return an int
    4. main() // main function to be executed when program runs
    5. {
    6. printf("Hello, world!\n"); // Print "Hello, world!" to the user, with newline
    7. return 0; // Terminate the program with status 0
    8. }