println "Hello,world!"

main = putStrLn "Hello, world!"

h

Hello, world!

class Hallo {
  public static void main(String[] args)
  {
    System.out.println("Hello,world!");
  }
}

document.writeln('Hello, world!');

"Hello,world!"

HAI;
  CAN HAS STDIO?;
  VISIBLE "HAI WURLD!";
KTHXBYE;

print("Hello,world!")

B4 09 8D 16 0D 01 CD 21 B8 00 4C
CD 21 48 65 6C 6C 6F 2C 20 77 6F
72 6C 64 21 24

AutoIt

#import
int main() {
  NSLog(@"Hello, world!");
  return 0;
}