107 questions linked to/from "Hello, World!"
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Write a “Hello” interpreter

Write a "Hello" interpreter Background Hello is a language "written" by Anne Veling, which errors if the program does not contain only h, and ...
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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 ...
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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 ...
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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 "...
164 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 ...
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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 ...
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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,...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
349 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,...
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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 ...
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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 ...
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Make a ;# interpreter

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