Linked Questions

437
votes
781answers
137k views

“Hello, World!”

So... uh... this is a bit embarrassing. But we don't have a plain "Hello, World!" challenge yet (despite having 35 variants tagged with hello-world, and counting). While this is not the most ...
513
votes
231answers
116k views

Showcase of Languages

Notes This thread is open and unlocked only because the community decided to make an exception. Please do not use this question as evidence that you can ask similar questions here. Please do ...
205
votes
301answers
48k views

Is this number a prime?

Believe it or not, we do not yet have a code golf challenge for a simple primality test. While it may not be the most interesting challenge, particularly for "usual" languages, it can be nontrivial in ...
126
votes
277answers
26k views

Shortest code to produce infinite output

Write the shortest code you can that produces an infinite output. That's all. You code will only be disqualified if it stops producing output at some point. As always in code golf, the shortest code ...
225
votes
75answers
75k views

Code that will only execute once

Goal The goal of this challenge is to write code that will execute once and only once. This means basically that it damages the program, script, or environment in some way. If rebooting the system ...
197
votes
79answers
35k views

Make your language unusable

Try to write some code in your language and make it not satisfying our criteria of being a programming language any more. A language satisfies our criteria (simplified version for this challenge) of ...
68
votes
214answers
21k views

Is this even or odd?

Note: There is not been a vanilla parity test challenge yet (There is a C/C++ one but that disallows the ability to use languages other than C/C++, and other non-vanilla ones are mostly closed too), ...
76
votes
68answers
21k views

Shortest program that throws StackOverflow Error [closed]

Write a program that throws a StackOverflow Error or the equivalent in the language used. For example, in java, the program should throw java.lang.StackOverflowError...
146
votes
25answers
18k views

Shortest Code to Legitimately Slack Off

I'm a developer, and I don't feel like doing my work. I know from XKCD that the best excuse for slacking off is that your code's compiling. Because of this, I think I need some code that will compile ...
43
votes
66answers
5k views

Blinking twelve

Many electronic devices, specially old ones, will show a blinking 12:00 when the time has not been set. The purpose of this challenge is to recreate this. ...
76
votes
37answers
12k views

Non-discriminating Programming

We say a string is non-discriminating if each of the string's characters appears the same number of times and at least twice. Examples "aa!1 1 !a !1" is non-...
54
votes
31answers
24k views

Create a memory leak, without any fork bombs [closed]

Your task is to create a memory leak. This is a program that uses loads of memory, until the computer runs out and has to do some swapping to save itself from running out. The only way that the memory ...
66
votes
36answers
11k views

Enlarge ASCII art

In this challenge, you must take multiline ASCII art as input, such as: ...
57
votes
35answers
8k views

Tips for golfing in Bash

What general tips do you have for golfing in Bash? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to Bash (e.g. "remove comments" is not ...
23
votes
76answers
8k views

Scream very loudly

Write a script that outputs A to stdout infinitely. There shold be no newlines or seperators between the characters Standard loopholes apply This is code-golf. ...
22
votes
30answers
4k views

Write an interpreter for *

The task is simple. Write an interpreter for the language *. Here's a bigger link to the wiki. There are only three valid * programs: * Prints "Hello World" <...
27
votes
25answers
4k views

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 "...
30
votes
11answers
1k views

Print, Increment, Decrement, Alias - Interpret Prindeal

Prindeal (pronounced prin-dee-al) is a new esoteric programming language that only has four commands: print, increment, decrement, and alias. Despite its minimalism, complex mathematical operations ...
18
votes
17answers
1k views

PPCG Jeopardy: Robbers

How well do you know the site? Let's find out. This is a cops-and-robbers challenge. Cop's thread. As a robber, you need to: Find a non-deleted, non-closed challenge that matches a cop's ...
11
votes
18answers
2k views

Shortest Code that creates a Deadlock

Write the shortest code to create a deadlock. Code execution must halt, so this doesn't work: ...
18
votes
11answers
2k views

Write an interpreter for my esoteric language Jumper

I have thought up esoteric language Jumper. Later you will see why. It operates with random-access-memory with bytes as cells. RAM is zero indexed and initially filled with zeros. When trying access ...
-10
votes
7answers
380 views

The null challenge: do nothing [closed]

Write the shortest possible program or function in your language that does nothing. Specifically, it must take no input or ignore its input, and must not produce any output in Standard Output and ...