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Produce a text file that prints "Hello World!" in as many programming languages as possible when compiled/interpreted, while also being as short as possible.

The score for your submission is calculated as C / 2 ^ ((L - 1) / 4), where "C" is the length of the text file in characters and "L" is the number of languages that the program is valid in. Lowest score wins, of course.

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This question is similar to this other one, but in this case, you can share "Hello World" among some languages if you wish. – Joe Z. Feb 15 '13 at 18:52
Does it have to be a whole program or just a valid command? – ASCIIThenANSI May 17 '15 at 14:45
up vote 13 down vote accepted
print("Hello World!")

Works in at least Julia, Perl, PHP, Python2, Python3, Qbasic, R, Ruby ...

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It also works in R and Julia (and surely in many other languages). – Sven Hohenstein Feb 19 '13 at 7:20
works in PHP too – jdstankosky Mar 8 '13 at 14:39
This print() syntax is also valid in Transact-SQL. – manatwork Mar 9 '13 at 16:03
Kind of forcing the limits, but we can say it works in JavaScript too, as some command line interpreters provide print() function for outputting. – manatwork Mar 9 '13 at 18:14
works in lua too – mniip Dec 31 '13 at 1:54
'Hello World!'

Runs in several scripting languages, including PHP, GolfScript, APL, ...

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Also AppleScript and Javascript :) – tomsmeding Feb 21 '13 at 19:03
Won't Javascript include the quotes? – Joe Z. Feb 22 '13 at 4:18
This works in PowerShell too. – Iszi Nov 22 '13 at 20:51

Score of 0.84


Works in H9+ and HQ9+.

1 / 2 ^ ((2 - 1) / 4) = 0.84

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JavaScript ES6, Oration, Vitsy, Minkolang score = 71.94703045766462

121 / 2^(3/4). Fun fact? I'm not trying to win, just to add as many languages as possible.

222 //X>"!dlroW olleH"Z 
alert("Hello World!")
capture Hello World!`
=` >###      .O$r"!"rXr<`

What Vitsy sees

"Well, I'm a 1D language, so... for now, only the first line counts."

222 //X>"!dlroW ,olleH"Z
222                      push three twos
    //                   divide twice
      X>                 drop the result and carry on
        "!dlroW ,olleH"Z standard Hello, World! program

Thanks for the cookie, Vitsy :3

What JavaScript ES6 sees

222 //X>"!dlroW ,olleH"Z

"Let's see... You put the number 222 and then put something in a comment. Alright, sure, I'll roll with that."


"You made a variable. Noted."

alert("Hello, World!")

"Ah, I see where you're going with this. I'll display that."

capture Hello, World!`

"Oo! A multiline string! Now we're talking, ES6 rulez, ES5 drools!"


"Well, I'm done. Peace out."

What Oration sees

222 //X>"!dlroW ,olleH"Z

"This wasn't on my notes...! Best not do anything."

alert("Hello, World!")

"Oh, here's some extra notes."



capture Hello, World!`

"...Hello, World!"


"thinks Nothing more! Great, I'm done here. breathes deeply"

Minkolang explanation

(Too lazy to create narrative. Might do later, the code took a while.) Irrelevant code replaced with # or omitted. Also, added comments C ... C.

222 ###>"!dlroW olleH"# 
$$$  C this separates layers C
###>### #####.O$r"!"rXr<`

Layer 1, pt 1

222 ###>"!dlroW olleH"# 
222                      C push three 2s C
   _                     C space; fall to the next layer C

Layer 2, pt 1

###>### #####.O$r"!"rXr<`
   >                       C go this way C
       _                   C fall to the next (first) layer C

Layer 1, pt 2

222 ###>"!dlroW olleH"# 
       >"!dlroW olleH"   C go right and push those characters in that order C
                       _ C fall to the next layer C

Layer 2, pt 2

###>### #####.O$r"!"rXr<`
                       <  C starts here, going left C
                      r   C reverse stack C
                     X    C pop n (n = 2), and pop top n items on stack (2, 2) C
                    r     C reverse stack C
                 "!"      C push exclamation mark (for some reason, it's chopped off C
                r         C reverse stack C
              $O          C output stack as characters C
             .            C terminate program C
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My child is proud of your submission. Here. Have a cookie. +1 – VTCAKAVSMoACE Feb 2 at 23:23

CoffeeScript and CJam, 46/2^((2-1)/4)=38.68

"Hello, World!"
e###alert "Hello, World!"
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TI-BASIC and Pyth, 13/2^((2-1)/4)=10.93

"Hello World!

Note: Non-competing answer, as Pyth was created after this challenge was posted

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Also works in ESMin, Japt, Teascript, O, etc. – Mama Fun Roll Feb 3 at 6:29

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