The code printf("goodbye, Dennis"); would give $ ./goodbye goodbye, Dennis$ What you want is to add a newline ('\n') at the end: printf("g

The code printf("goodbye, Dennis"); would give $ ./goodbye goodbye, Dennis$ What you want is to add a newline ('\n') at the end: printf("goodbye, Dennis\n"); Now you get $ ./goodbye goodbye, Dennis $ That's why the canonical "hello, world" program contains the line printf("hello, world\n");