Linked Questions

30
votes
36answers
5k views

Fibtraction - Fibonacci but with subtraction [duplicate]

The Fibtraction sequence (as I call it) is similar to the Fibonacci sequence except, instead of adding numbers, you subtract them. The first few numbers of this challenge are: ...
5
votes
4answers
255 views

Implement the Fibonacci sequence… Shifted to the right [duplicate]

Background We all know the famous Fibonacci sequence, where each term is the sum of the previous two, with the first term being 0 and the second one being ...
-2
votes
4answers
442 views

Calculate Fibonacci series from nth term to mth term [duplicate]

Your goal is to calculate the sum of Fibonacci series from n th term to m th term (including both terms). No use of / * % or mathematically what they are in your ...
3
votes
1answer
484 views

Add the Fibonnaci Sequence to the Lucas Sequence [duplicate]

Background of Lucas Numbers The French mathematician, Edouard Lucas (1842-1891), who gave the name to the Fibonacci Numbers, found a similar series occurs often when he was investigating Fibonacci ...
520
votes
235answers
118k 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 ...
76
votes
184answers
17k views

Find the Factorial!

Create the shortest program or function that finds the factorial of a non-negative integer. The factorial, represented with ! is defined as such $$n!:=\begin{...
55
votes
146answers
6k views

Evolution of OEIS

In this challenge, the goal is to recreate the On-Line Encyclopedia of Integer Sequences one sequence at a time. Similar to the Evolution of Hello World, each answer depends on a previous answer. ...
68
votes
55answers
15k views

Tips for code-golfing in C#

What general tips do you have for golfing in C#? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to C# (e.g. "remove comments" is not an ...
67
votes
51answers
21k views

Tips for golfing in Ruby

What general tips can you give for golfing in Ruby? I'm looking for ideas that can be applied to code golf problems in general that are specific to Ruby. (For example, "Remove comments" would not be ...
134
votes
28answers
11k views

Making Future Posts Runnable Online with Stack Snippets

Stack Snippets were recently added to PPCG! Reminiscent of JSFiddle, Stack Snippets allow HTML, CSS, and JavaScript to be run directly in posts! Here is a very simple Stack Snippet: ...
49
votes
61answers
10k views

Am I a Fibonacci Number?

Your Task: Write a program or function to check if a number that is inputted is a Fibonacci number. A Fibonacci number is a number contained in the Fibonacci sequence. The Fibonacci Sequence is ...
35
votes
56answers
4k views

Fibonacci-orial

Definition Fibonacci sequence F(n), on the positive integers, are defined as such: ...
27
votes
48answers
4k views

Golf a Custom Fibonacci Sequence

The Fibonacci sequence is a fairly well known thing around here. Heck, it even has its own tag. However, for all that, we sure like to stick to our roots of ...
32
votes
32answers
4k views

Binary Fibonacci

Challenge You need to generate a program or function that takes in a positive integer N, calculates the first N terms of the Fibonacci sequence in binary, concatenates it into a single binary number, ...
23
votes
22answers
4k views

Calculating (3 + sqrt(5))^n exactly

Today your goal is to find integers a and b given non-negative integer n such that: You should write a program or a function that takes parameter n and outputs a and b in a format of your choice. ...

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