191k 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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### 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 ...
90k views

### Most creative way to display 42

Douglas Adams was born on March 11, 1952, and died when he was just 49. In honor of this wonderful writer, I challenge you to display 42 in the most creative way possible. You could print it in the ...
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### 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 ...
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### Code Golf Christmas Edition: How to print out a Christmas tree of height N

Given a number N, how can I print out a Christmas tree of height N using the least number of code characters? ...
• 1,445
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### Reimplementing square root [duplicate]

Define a function, s, which takes a number and returns the square root. No use of library functions, such as Java's Math.sqrt() or PHP's built in sqrt(), allowed.
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### Calculate golden ratio

Write the shortest code, in number of bytes, to display, return, or evaluate to the golden ratio (that is, the positive root of the quadratic equation: $x^2-x-1=0$, approximately 1.618033988749895), ...
16k views

### Tips for golfing in 05AB1E

Do you have any tips for code-golfing in 05AB1E, a golfing language created by Adnan? Your tips should be at least somewhat specific to 05AB1E. Please post one tip per answer.
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### Determine whether a number is 2017-friable without primes in your source code

Out of all the years I've been making this challenge, 2017 is the first year that's been a prime number. So the question will be about prime numbers and their properties. Your task is to produce a ...
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### Recycling for the New Year

A good resolution for 2015 is to live more sustainably. We'll start by recycling. Recycling code, that is! Your task is to print the number 2015 to STDOUT, with or ...
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### Build interpreter for non-existent language

Build an interpreter for a fake, stack-based language that gets an input, interprets it, and outputs the result as an array of numbers. It should iterate through each byte and perform a different ...
• 903
2k views

### Anti-golfscript anti-golf: create a task where GolfScript or J is outgolfed by your (conventional) lang [closed]

You need to make three things: Statement of a task, T. Solution of the task in language not typically used for golfing, A. Solution of the task in language typically used for golfing, B. Don't try to ...
• 2,697
870 views

### Happy new year string builder

This question is inspired by this awesome answer. The challenge is to write a program or function which takes in a positive integer, and outputs "Happy new year to you" or a slight variation ...
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### Eternal 2014 — PCG.SE New Year’s Puzzle 2015

So, now that it's 2015, and a bunch of answers from last year's puzzle are now starting to produce invalid output, it's time for a question involving the number 2015. Except... why? Wouldn't you like ...
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1k 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 ...
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2k views

### Auto-golf an esolang

The lack of a social life drove a poor nerd into inventing another superfluous esolang called !+~%. For no good reason it initializes the accumulator with ...
• 2,381
1k views

### Produce the number 2014 from an image [closed]

In the 2014 challenge, Michael Stern suggests using OCR to parse to 2014. I'd like to take this challenge in a different direction. Using built-in OCR from the language/standard library of your ...
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907 views

Golf the leaderboard of this question (id=111735). Your program should issue one HTTP or HTTPS request to StackExchange API, parse it and present to user in form similar to a typical Leaderboard ...
• 2,697
413 views

### I deserve a castle for it only being Tuesday

It is only Tuesday, ugh. I deserve a treat. Golf me a Castle. The Least amount of bytes wins! Taken no input and output this image exactly: ...
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