Linked Questions

520 votes
984 answers
193k 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 ...
Martin Ender's user avatar
551 votes
241 answers
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 ...
235 votes
369 answers
65k 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 ...
Dennis's user avatar
  • 210k
329 votes
179 answers
143k views

Tips for golfing in Python

What general tips do you have for golfing in Python? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Python (e.g. "remove comments" is ...
moinudin's user avatar
  • 12.7k
112 votes
330 answers
22k views

Simple cat program

One of the most common standard tasks (especially when showcasing esoteric programming languages) is to implement a "cat program": read all of STDIN and print it to STDOUT. While this is named after ...
Martin Ender's user avatar
79 votes
261 answers
25k 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), ...
Matthew Roh's user avatar
  • 5,347
173 votes
98 answers
69k views

Tips for golfing in JavaScript

What general tips do you have for golfing in JavaScript? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to JavaScript (e.g. "remove ...
mellamokb's user avatar
  • 6,083
340 votes
42 answers
318k views

High throughput Fizz Buzz

Fizz Buzz is a common challenge given during interviews. The challenge goes something like this: Write a program that prints the numbers from 1 to n. If a number is divisible by 3, write Fizz instead....
Omer Tuchfeld's user avatar
86 votes
138 answers
13k views

Collatz Conjecture (OEIS A006577)

This is the Collatz Conjecture (OEIS A006577): Start with an integer n > 1. Repeat the following steps: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1. It is proven that ...
Doorknob's user avatar
  • 71.5k
57 votes
154 answers
8k views

The vanilla factorial challenge

Task Given a non-negative integer \$n\$, evaluate the factorial \$n!\$. The factorial is defined as follows: $$ n!=\begin{cases}1 & n=0\\n\times(n-1)!&n>0\end{cases} $$ Rules All default I/...
Bubbler's user avatar
  • 76.8k
106 votes
39 answers
28k views

Tips for golfing in Java

Are there any useful shortcuts that can be used in Java? As shown below, import already adds at least 17 characters to a program. ...
user avatar
83 votes
46 answers
11k views

Fibonacci + Fizz Buzz = Fibo Nacci!

Fibonacci + FizzBuzz = Fibo Nacci! Your challenge is to create a Fibo Nacci program! A Fibo Nacci program outputs the first 100 Fibonacci numbers (starting from 1). If the Fibonacci number is ...
user41805's user avatar
  • 13.1k
53 votes
51 answers
8k views

Tips for golfing in PowerShell

What general tips do you have for golfing in Windows PowerShell? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to PowerShell (e.g. "...
Joey's user avatar
  • 13k
30 votes
54 answers
8k views

The Smart Person's Mirage

Once upon a time, I was reading this question/answer on Quora Are there really programmers with computer science degrees who cannot pass the FizzBuzz test This code is given as the obvious answer <...
gnibbler's user avatar
  • 15.1k
46 votes
50 answers
5k views

The Rien Number

The Champernowne constant is a number that is constructed by concatenating the first n numbers, with n tending to infinity. It ...
Conor O'Brien's user avatar

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