#include

int main()
{
    printf("Hello World!\n");
    return 0;
}

The Hello World C programming by  Brian Kernighan and Dennis Ritchie that started it all.

C makes it easy to shoot yourself in the foot; 
C++ makes it harder, but when you do, it blows your whole leg off. 

- Bjarne Stroustup, creator of C++ programming language

Python 2016 

President = "Donald J Trump"
if President == "Donald J Trump":
	print "Goodbye, World!"
else:
	print "Hello, World!"