Linked Questions

498 votes
913 answers
171k 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 ...
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545 votes
239 answers
127k 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 not ...
228 votes
335 answers
58k 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 ...
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  • 206k
168 votes
458 answers
32k views

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 ...
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  • 11.1k
141 votes
320 answers
30k 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 ...
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  • 2,376
247 votes
81 answers
79k 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 ...
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  • 2,797
211 votes
88 answers
38k 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 ...
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  • 35.8k
78 votes
250 answers
24k 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), ...
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  • 5,271
49 votes
175 answers
12k views

Scream very loudly

Write a script that outputs A to stdout infinitely. There should be no newlines or separators between the characters. Standard loopholes apply. This is code-golf. ...
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  • 1,057
77 votes
68 answers
22k 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...
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  • 1,085
154 votes
28 answers
19k 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 ...
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51 votes
71 answers
10k views

Shortest program that continuously allocates memory

Write a program which runs forever and allocates more and more memory on the heap the longer it runs, at least until you reach the limit of the operating system on the amount of memory that can be ...
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  • 2,376
45 votes
71 answers
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. ...
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  • 99.3k
64 votes
41 answers
10k 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 ...
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  • 19.4k
76 votes
37 answers
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-...
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  • 25k

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