This is a small collection of "Hello World!"-Programs - One for each letter of the alphabet. Ada for A, Boo for B, C++ for C, and so on. Special thanks to the stackoverflowers who helped me with Q, U and Y :-)

Ada

with Text_IO; use Text_IO;
procedure Hello is
begin
    Put_Line("Hello World!");
end Hello;

Boo

print("Hello World!")

C++

#include <iostream>

int main( int argc, char** argv ) {
    std::cout << "Hello World!" << std::endl;
    return 0;
}

D

import std.stdio;

void main(string[] args) {
    writefln("Hello World!");
}