107 questions linked to/from "Hello, World!"
4k views

### Write a “Hello” interpreter

Background Hello is a language "written" by Anne Veling, which errors if the program does not contain only h, and will print ...
252 views

### Golf a Golfing Language [closed]

Design a language and golf its interpreter so that it solves the following programming challenges in as few bytes as possible: Hello World cat Fizz Buzz List the first $n$ primes Fibonacci Sequence ...
1k views

### The 1+ Metagolf Challenge

I'm letting this one out of the sandbox. Hopefully it is well-written and make sense, feel free to improve. So in order to make 1+ more popular (and ease the creation of golfed 1+ text-printing ...
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### Orientation Oriented Programming

Write a program for a specific language that in different orientations performs different tasks. Your code should have at least two non-empty lines and at least two non-empty columns and should ...
560 views

### Hello ASCII World!

Construct a full program which outputs Hello, World!. The score of your submission will be equal to the sum of all of the ASCII values of the distinct characters. ...
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### 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 "...
172 views

### Best free online resources to learn competitive programming [closed]

I am quite proficient in C++ and Java and want to learn competitive programming to participate in contests like Google codejam and other online contests held on sites like CodeChef and Codeforces. I ...
2k views

### Tips for Creating/Maintaining a Golfing Language

Creating a golfing language can be hard. Let's help budding golfing language creators out and provide some helpful tips on how to create one. I'm looking for tips on: The design process ...
15k views

### Biggest Irreducible Hello World

Create a program that outputs Hello, World! The winner is the source code that is the biggest, subject to the constraint that it is irreducible For this challenge,...
2k views

### Letters challenge

Using the word “conemon” print each character 2 times more than the last. The first letter, “c”, should be printed 10 times, the second 12 and so on. Each repeated-letter-string should be printed on a ...
7k views

### Count Like a Babylonian

Challenge Given an ASCII representation of a Babylonian number as input, output the number in Western Arabic numerals. Babylonian Numeral System How did the Babylonians count? Interestingly, they ...
820 views

### 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 ...
8k views

Challenge: The concept is simple enough: write a full program to output its own code golf score! Output should only be the byte count of your program and a trailing ...
968 views

### Text to Brain-Flak

Your challenge is to turn input text to brain-flak code that will output the text. Tutorial taken from here with permission here Brain-Flak has two stacks, known as 'left' and 'right'. The active ...
2k views

### Design a One Instruction Set Computer!

Notice: I'm willing to give a bounty to any answer that I find interesting. Your challenge is to design a Turing-complete one instruction set computer (OISC): An OISC is an abstract machine that ...
40k views

### Write Moby Dick, approximately

Here is a 1.2Mb ASCII text file containing the text of Herman Melville's Moby-Dick; or, The Whale. Your task is to write a program or function (or class, etc. -- see below) which will be given this ...
482 views

### 8 8's make 1000

Print the following output of a happy coincidence addition pattern: 8 8 8 88 +888 ---- 1000 Rules: No leading spaces except the ones already present ...
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### Hello World in Multiple Languages

Task Create a program or a function that is valid in multiple programming languages, and when compiled/interpreted as a different language outputs "Hello, World!" in a different natural language. ...
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### Turn an integer n into a list containing it n times

Given an integer n as input, return a list containing n, repeated n times. For example, the ...
3k views

### Script that outputs a script that prints a given input

Write a piece of code that takes a string as input, and outputs a piece of code in the same language that, when run, will output the initial input string. It must be able to handle any combination of ...
357 views

### Implement the Cubically Cube

Cubically is a fairly new esoteric language capable of creating short, golf-like answers for a very specific subset of problems. It is unique in that it stores memory in the form of a 3x3 Rubik's cube,...
2k views

### Most efficient cubifier

Cubically is too tedious to manually write any code in. Your challenge is to translate ASCII text into Cubically source code. Cubically This is just a quick run-down of Cubically; the repository has ...
3k views

### MacGyver's Toolbox [duplicate]

In this question each answer will get a "toolbox" that can be used to construct a program/function. The toolbox will consist of two things: a list of programming languages a list of valid characters ...
10k views

### Make a ;# interpreter

I recently created a new language called ;# (pronounced "Semicolon Hash") which only has two commands: ; add one to ...
5k views

### How long is my number?

Challenge Given an integer, Q in the range -(2^100) ≤ Q ≤ 2^100, output the number of digits in that number (in base 10). ...
726 views

### Unrestricted Languages

One of my favorite types of challenges on this site are restricted-source challenges. These challenges impose a computer tractable restriction that the sources of potential answers must pass. I like ...
3k views

### Surprise Party for Brain-Flak

This question is part of a series Brain-flak Birthday challenges designed to celebrate Brain-Flak's first Birthday. You can find more information about Brain-Flak's Birthday here. Today is Brain-Flak'...
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### This is how we roll

Piet is an interesting programming language for a number of reasons. Today we will focus on one reason: the roll command. The roll command was originally from PostScript and is a powerful way to ...
556 views

### Flip a coin for me! [duplicate]

Note: There was not a vanilla challenge to actually flip a coin, even though there were mentions about flipping coins a lot of places. Even though there is a challenge to generate a random number from ...
22k 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), ...
1k views

### Hello World - but alphabetically

This challenge sounds too simple to not already exist, so let me know if it is a duplicate. The task Print Hello, world! The rules Your code has to be in "byte ...
6k views

### Create an Alphabet Song

Your goal is to create an alphabet song as text in the following form (in order): ...
222 views

### Tell me I'm pretty! [closed]

I only very recently discovered code golf and just found this part of the Stackexchange network, and naturally after looking at so many clever answers, I feel inferior. Inner me knows I'll get better ...
7k views

### Create a Checkbox

Write a program that creates a two-state checkbox that people can interact with using a mouse. Specifically, your program should achieve all of the following: Have a 8×8 pixel (or larger if desired) ...
14k views

### Output programming language name

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 ...
567 views

### Hello World!… in pure x86 opcodes [duplicate]

This is a Hello World challenge! Those plain ones! Yeah.... However, it's different this time. Because here, you can't use C or C++ or Stuck or ArnoldC or whatever you want. You can only choose raw ...
930 views

### Print 'em goats [duplicate]

Related Goats are great. Everybody loves goats. And they also, for some reason, are an excellent complex ascii art for many languages to have built-ins for. Because of this, I personally feel a ...
324 views

### Hello World! generator [duplicate]

Often I need a simple Hello World! program to show some basic concepts of a programming language on my travels. As I usually travel only with light luggage I can't to carry a Hello World! program for ...
7k views

### print “Hello, World!”

Yes, really. Print it with a hardware printer 🖨 to create a hard copy. Send the necessary commands/data to your printer such that the following text is printed on a piece of paper: Hello, World! ...
228 views

### Hello World!++ (Hello World with input) [duplicate]

ltl, ftp Prelude I'm pretty sure you've seen a ton of Hello World challenges before... So I've created this simple twist... Challenge Golf me a simple program that: Takes any amount of ASCII ...
1k views

### Output the HTML colors

The 16-color CGA palette (also known as the HTML colors) is a set of 16 colors used by early graphics adapters. The goal of this challenge is to output all 16 of them, in hex format (...
105k views

### Add a language to a polyglot

This is an answer-chaining challenge in which each answer builds on the previous answer. I recommend sorting the thread by "oldest" in order to be sure about the order in which the posts are made. ...
227 views

### Tips for golfing in Wierd

What tips do you have for golfing in Wierd? Tips for golfing other languages don't seem to help one golf Wierd programs so I'm looking for ideas that can be applied to code golf problems that are ...
2k views

### 8 ought to become Infinity [closed]

Let's take a look on a typical loop, which usually performs 8 iterations: for (int x=0; x<8; ++x); You have to make it infinite! It's a popularity-contest ...
304 views

### Friday 11/11/2016 11:11:11PM PST [duplicate]

As of posting this question, the date/time was: Friday 11/11/2016 11:11:11PM PST Wow, such a rare occurrence! This definitely deserves a challenge made for it! ...
8k views

### Print some JSON

This challenge is straightforward, but hopefully, there are plenty of avenues you can approach it: You need to print/return a valid JSON object of at least 15 characters, not counting unessential ...
441 views

### Print the Greek alphabet in words

This is different from Print the Greek alphabet! because it is in words. This is different from "Hello, World!" because the output is different and much longer, leading to different ...
2k views

### Tips for Golfing in Brain-Flak

Brain-flak is a stack-based turing-tarpit language, written collaboratively between me, DJMcMayhem, and 1000000000. Some users are very experienced in the mysterious ways of Brain-Flak. So I thought ...