194k 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 ...
136k 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 ...
18k views

### 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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### 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 ...
17k 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.
7k views

### 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 ...
5k views

### 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), ...
20k views

### 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? ...
370 views

### 12 with no 1234567890, but polyglot

This is my 12th question, so I thought of this idea. Goal: Output 12, with any preceding or trailing whitespace permitted In as many languages as possible (where different versions or flags count as ...
874 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 ...
2k views

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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 ...
710 views

### Count up from 0 to 2017 without numbers in your source

This question was profoundly inspired by Joe Z's question. But, with a twist... So, now that it's almost 2017, it's time for a code question involving the number 2017. Your task is to make a program ...
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 ...