Linked Questions

172 votes
483 answers

Implement a Truth-Machine

A truth-machine (credits goes to this guy for coming up with it) is a very simple program designed to demonstrate the I/O and control flow of a language. Here's what a truth-machine does: Gets a ...
a spaghetto's user avatar
  • 11.2k
103 votes
298 answers

Create output twice the length of the code

The Challenge Write a complete program that writes twice as many bytes to standard output as the length of the program. Rules The program must write ASCII characters to the standard output. The ...
Daniel M.'s user avatar
  • 3,929
45 votes
138 answers

Print invisible text

Given a string as input, output a number of whitespace characters (0x0A and 0x20) equal to the length of the string. For example, given the string Hello, World! ...
Mayube's user avatar
  • 11.6k
147 votes
119 answers

Shortest Error Message

Challenge Write the shortest program that, when compiled or executed, produces a fatal error message smaller than the program itself. The error message may not be generated by the program itself, ...
user72528's user avatar
  • 1,493
62 votes
111 answers

Goodbye Cruel World!

Background Hello golfers! I would like to learn all the programming languages! But I kinda have a short attention span... and copying all the Hello World examples gets boring... but I like fire! ^w^ ...
Tezra's user avatar
  • 1,549
44 votes
90 answers

Notcalc (Calculate the wrong answer)

Goal: Given two natural numbers (integers from 0 to infinity), output a number that is not the sum of those numbers, but is a natural number. Example solutions (TI-Basic): ...
Julian Lachniet's user avatar
23 votes
50 answers

Code point sum quine

All the quine challenges on this site are focused on byte count, or the characters themselves. This one is different. Your challenge is to write a program that produces output which has a code point ...
MD XF's user avatar
  • 13.7k
33 votes
30 answers

Ah, why is there a bug in my program?

This challenge is inspired by @LuisMendo's MATL answer to my "binary multiples" challenge. Task Pick a code-golf challenge that is open and that has been posted before this one; let me call it the "...
RGS's user avatar
  • 14k
30 votes
30 answers

Output with the same length always

With challenges like Output with the same length as the code and Create output twice the length of the code, I thought of a separate, but similar challenge. The task is to produce an output. It can ...
maxb's user avatar
  • 6,837
14 votes
14 answers

Output code-sized Lorem Ipsum [closed]

Output the same length of Lorem ipsum your code is! Rules: Code can't be identical to output No compression libraries Shortest program in two weeks wins No network usage, file reading and other ...
randomra's user avatar
  • 20.8k
17 votes
9 answers

The NX source-length problem [duplicate]

On PPCG, we have had lots of challenges where the length of your output is dependent on the length of your source code. For the purposes of this challenge, we will call these Source-length problems. ...
DJMcMayhem's user avatar
  • 58.8k
16 votes
4 answers

Tips for golfing in ///

What general tips do you have for golfing in ///? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to /// (e.g. "remove unnecessary ...
sporkl's user avatar
  • 6,804
38 votes
3 answers

Build a golfing language with me

A lot of PPCG users helped with the creation of this challenge, both in chat and the Sandbox, specifically Martin Ender, AdmBorkBork, Emigna and user202729 Our community has found it necessary to ...
caird coinheringaahin g's user avatar
-3 votes
3 answers

Make a program that prints its own size [closed]

Challenge: Create a program that prints out the size of its own source code file. For example, a 35 bytes size of program must print out 35. Pre-calculation is not valid. What I mean by pre-...
vvvnn's user avatar
  • 119