Output programming language name

Question

Challenge:

In the programming language of your choice, take no input and output your programming language's name.

Fair enough, right?

Restrictions:

• You can't use any character that is included in your programming language's name in your code. E.g., if I use Batch, I must not use the chars 'B' 'a' t' 'c' 'h' in my code. Note that this is case sensitive. I can still use the char 'b' because it's different from 'B'.
• You can have "junk output" before or after the name of the language
• Version number doesn't count as part of the name of the language. E.g., I can use the number 3 in the code in my answer if it's in Python 3
• The output of the programming language name is not case sensitive.
• Brute-forcing all possible letter combinations and hoping you get your language name is forbidden.

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Example outputs: (let's say my programming language is called Language) (✔ if valid, else ✖)

• Language ✔
• Body language is a type of non-verbal communication in which physical behavior, as opposed to words, is used to express or convey information. Such behavior includes facial expressions, body posture, gestures, eye movement, touch and the use of space. ✔
• Language 2.0 - © 1078 AD some company ✔
• foobar ✖

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This is code-golf thus shortest code wins.

Answer 1

><>, 8 bytes

f4*:2+oo

Try it online!

Prints the string >< repeatedly.

Answer 2

FerNANDo, 79 bytes

3 3
1
2 2
0 3 0 0 0 2 2 1
0 3 2 0 1 3 1 2
0 3 2 2 0 1 2 0
0 3 1 0 3 3 3 1
1 1
1

Try it online!

Based on primo's technique for "Hello, World!". The idea is to loop twice through four printing commands, while using the variables 0, 1, 2, 3 for all possible combinations of the values 0/1:

variable                0  1  2  3
value on 1st iteration  0  0  1  1
value on 2nd iteration  0  1  0  1

With these, we can then encode arbitrary pairs of characters to be printed, which allows us to print four characters in each iteration. I used this CJam script to compute the printing commands (change the 4 to a different value if you want to print a different number of characters per iteration).

I also tried doing 3 iterations, like primo's answer (which would require printing a trailing linefeed), but that ends up being a few bytes longer. It might be possible to save bytes by using 4 iterations, since you need only a few of the possible byte combinations (0 2 4 7 9 12 15, specifically), but I need to take more time to figure out how to compute them efficiently.

Answer 3

PHP, 2 bytes (0 bytes of code plus 2 bytes for extra command line arguments)

-i

Outputs a ton of stuff, including:

PHP Version => 7.1.1
PHP API => 20160303
PHP Extension => 20160303
PHP Extension Build => API20160303,NTS
PHP License

Answer 4

Bash (+ coreutils), 8 3 bytes

env

Try it online!

Output is

  .
  .
  .
SHELL=/bin/bash
  .
  .
  .

Answer 5

Perl 5.10+, 18 bytes

$ perl -E'/.\KIO/~~%::;say$`'
Perl

Requires Perl 5.10 or higher for say, \K, and the smartmatch operator ~~.

Per this meta answer, I'm not counting -E, although there are dissenting opinions.

How it works

The main symbol table %main:: (or %:: for short) always contains an entry for PerlIO:

$ perl -E'say $main::{"PerlIO::"}'
*main::PerlIO::

A symbol table is just a hash; you can search for keys that match a given regex using smartmatch:

$ perl -E'say "match" if /.\KIO/ ~~ %main::'
match

(There's also an entry for IO::, but it doesn't match this regex.)

\K causes the regex engine to "keep" everything matched up to that point and not add it to $&, so you end up with the text "IO" in $& and "Perl" in $`.

---

On newer versions of Perl, smartmatch will trigger a warning, but the output is still valid:

$ perl -E'/.\KIO/~~%::;say$`'
Smartmatch is experimental at -e line 1.
Perl

Shorter solution for Perl < 5.18

Perl 5.18.0 introduced hash randomization. Before that, functions like keys always returned hash keys and values in the same order from run to run.

On my installation of Perl 5.16.3 on Linux, the entry for PerlIO:: always appears before the entry for IO::, so I can shave off three bytes from the regex:

$ perl5.16.3 -E'/IO/~~%::;say$`'
Perl

I suspect this will work for other installations < 5.18 (I've only checked 5.16.3 and 5.8.8).

Answer 6

Juggle, 34 bytes

Golfed: 3<5=a5<1|a"5<2|1|a"a|7""6<1|a"a|5"

Ungolfed:

3<5=a
5<1|a"
5<2|1|a"
a|7""
6<1|a"
a|5"

Explanation:

Juggle is always read left to right and will never back track. The only arithmetic available is bitwise operations, so I create a base of 3 left-shifted by 5 digits, resulting in a base value of 96. Juggle is also limited to integer literals of 0-9. The rest of it is just pretty much bit math with a as a base, since all the characters start with 11 in the most significant digits. The " outputs that integer as a character with no new line.

Answer 7

Forth (gforth), 4 bytes

COLD

This word prints the following text (version number may vary):

Gforth 0.7.3, Copyright (C) 1995-2008 Free Software Foundation, Inc.
Gforth comes with ABSOLUTELY NO WARRANTY; for details type `license'
Type `bye' to exit

Answer 8

chicken (not scheme), 1 byte

The language name might also be chicken chicken, see here

a

outputs:

Error on line 1: expected 'chicken'

Answer 9

Bash, 9 bytes

--verSion

Will output the following:

GNU bash, version 4.2.46(1)-release (x86_64-redhat-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

which has the word bash in it.

Answer 10

T-SQL - 58 Bytes

print left(char(84)+char(45)+substring(@@version,11,3),5)

Making use of the casing difference on the highlighted chars.

Answer 11

Python 2, 44 bytes

exec('pRINt'.upper().swapcase()+' "pYTHON"')

Try it online!

It works by taking a weirdly capitalized string and making it normal, then executing it. I originally solved this by using this method to import sys, but then I realized I could just use it with print.

Answer 12

Ly, 10 bytes

(76)(89)&o

Pretty easy with Ly, due to the short name and little use of letters.

Outputs:

LY

Try it online!

Answer 13

Julia, 28 bytes

show("\x6A\x75\x6C\x69\x61")

As it turned out, the hardest part wasn't encoding the string (easy enough with escapes and an ASCII table), but finding a function in the standard library to show it. Most of them have one of the letters of ['a', 'i', 'j', 'l', 'u'] in them.

Answer 14

><>, 9 bytes

"-o_!\ _!

Try it online!

Same byte count, much cleaner output. Now it only outputs ><> and nothing else by subtracting the difference between pairs of no-ops. I was very lucky that > + ! is _ which is a no-op when traveling horizontally.

><>, 9 bytes

"2*4-o! !

Try it online!

How It Works:

Initially the " pushes the source code in reverse. 2*4-o multiplies the value of the final ! by 2 and subtracts 4 to make it correspond to >. The ! skips over the " so no more code is pushed to the stack, and it repeats the operation over the rest of the source code, resulting in an output of ><>ÚVdP`

Answer 15

MathGolf, 10 bytes

ÿ∙╤Æⁿ½]$╦y

Try it online!

Explanation

ÿ∙╤Æⁿ        Push "∙╤Æⁿ"
     ½       uninterleave, pushing "∙Æ" and "╤ⁿ" to the stack
      ]      wrap stack in array
       $     push ord(a) for each element in the array
        ╦    fetch dictionary words ("Math" and "Golf")
         y   join array without separator to string or number

With dictionary popping using strings, which should be coming in the next version, this will be 1 byte shorter (remove $).

The boring solution (1 byte)

'

From TIO:

Traceback (most recent call last):
  File "/opt/mathgolf/math_golf.py", line 750, in <module>
    result = evaluate(code_list[:], stdin, Stack([]))
  File "/opt/mathgolf/math_golf.py", line 115, in evaluate
    stack.append(code.pop().char)
IndexError: pop from empty list

This is implementation dependent, but if you're planning on using MathGolf, you'll probably pull the git repository, which is named mathgolf, meaning that unless the directory is renamed, the error will persist.

Answer 16

05AB1E, 7 bytes

•₄)í•hÁ

Try it online.

Explanation:

•₄)í•    # Push compressed integer 5943776
     h   # Convert it to hexadecimal: "5AB1E0"
      Á  # Rotate it once towards the right: "05AB1E"
         # (after which the result is output implicitly)

See this 05AB1E tip of mine (section How to compress large integers?) to understand why •₄)í• is 5943776.

Answer 17

Unix shells (bash, sh, zsh, etc) to STDERR, 1 byte

The shells bash, ksh, sh, zsh all output their name to STDERR when you give them an unknown command, e.g.

1

Examples:

λ bash<<<1
bash: line 1: 1: command not found

λ zsh<<<1
zsh: command not found: 1

λ ksh<<<1
ksh: line 1: 1: not found

λ sh<<<1
sh: line 1: 1: command not found

λ fish<<<1
fish: Unknown command 1

If the challenge requires output to STDOUT, add 5 bytes 2>&1 to redirect it:

λ bash<<<1 2>&1
bash: line 1: 1: command not found

If the challenge had specified "use a valid program"... zsh, 18 bytes

<<<$'\x7a\x73\x68'

• try it online

• not like this! echo "\x7a\x73\x68", as Gamma pointed out

Answer 18

Go, 0 bytes

Try it online!

Output: package main: code.go:1:1: expected 'package', found 'EOF'

Answer 19

Linux, Unix Shell (sh/bash...) (6 bytes)

find /

Answer 20

Pxem, (See below)

Depends on invokation

pxemi.7z, 0 bytes (on invokation).

Compile the source code in C++ and run the interpreter with no arguments, like this: /path/to/pxemi. The following line is output to stderr: usage: pxemi pxemFileName.

RPxem, 0 bytes (on invokation)

Just like nk.'s pxemi, run with no arguments: Usage: rpxem path-to-pxem-file.pxe can be seen.

Programs

Pxem, 6 bytes of filename only, case-insensitive, boring.

• Filename: pXEM.p.
• Content: none.

Pxem, 18 bytes of filename only, case-sensitive output, depends on ASCII-compatible filesystem.

• Filename: @-.+23.+7A.+%+.+.p
• Content: None

How it works

On every ??.+ each character is generated with sum of two characters' ASCII code from backwards.

Answer 21

Pyth, 1 byte

.

Try it here!

On the online interpreter, prints the following to stderr:

Traceback (most recent call last):
  File "pyth.py", line 737, in <module>
    py_code_line = general_parse(pyth_code, safe_mode_on)
  File "pyth.py", line 46, in general_parse
parsed, tokens = parse(tokens, safe_mode)
  File "pyth.py", line 74, in parse
    raise PythParseError(active_token, rest_tokens)
extra_parse.PythParseError: . is not implemented, 1 from the end.

The exact error message differs depending on the environment Pyth is running in, but it always includes PythParseError.

Answer 22

Red, 9 bytes

prin 'rED

Due to the rules, this is valid, but it's boring, so let's not do that, ok?

---

Non-trivial, 35 bytes

prin#"Q"+ 1 prin#"f"- 1 prin#"c"+ 1

This takes Q, f, and c as character codes, adds or subtracts 1, then prints them without newlines. Q + 1 = R, f - 1 = e, c + 1 = d. Unfortunately, this doesn't work on TIO, but you can try it locally.

Answer 23

Pyth, 5 Bytes

"pYTH

Simple prints the string pYTH to stdout.

Answer 24

K (ngn/k), 5 bytes

`c$75

Try it online!

There seems to be no rules for inplementation-specific programming languages, so I will assume the name of the implementation doesn't need to be included.

Answer 25

APPLESOFT BASIC, 87 bytes / 62 tokenized bytes

0x$="":goto1to==^atint>notabscolor=fntoint-spc(pr#
1pokepeek(131)+peek(132)*256,19:?x$

Enter the program in lower-case. The output printed:

 ":+1APPLESOFT BASIC

Answer 26

JavaScript (ES6), 29 45 bytes

There's probably a better way.

let f =

_=>'\x4A\x61\x76\x61\x53\x63\x72\x69\x70\x74'

console.log(f())

Answer 27

CJam, 8 6 bytes

"cjAM"

Try it online!

Old version

"BI`l":)

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"BI`l"    e# Push this string
:)        e# Add 1 to the code point of each char. Implicitly display

Answer 28

QC 16 bytes

&000051430A0D00#

&0000 Write hex to memory at address 00 until 000 is reached
51430A0D00 QC with a new line and the terminator at the end
# Print contents of memory until first 00 is reached

Answer 29

05AB1E, 11 bytes

¾4>'§ÅX69çJ

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Explanation

¾              # push counter (initially 0)
 4>            # push 4+1
   '§Å         # push the word "ab"
      X        # push variable X (initially 1)
       69ç     # push char value of 69: "E"
          J    # join as string

Answer 30

Chicken, 1 byte

g

This could be pretty much any character and it would be the same.

Outputs Error on line 1: expected 'chicken'.

Try it here.