Sha256: 6e8613df9a80a22758a7f30fb474c533b16e08c5d889bba6b7a90159d3789024

Contents?: true

Size: 1.36 KB

Versions: 55

Compression:

Stored size: 1.36 KB

Contents

# Collatz Conjecture

The Collatz Conjecture or 3x+1 problem can be summarized as follows:

Take any positive integer n. If n is even, divide n by 2 to get n / 2. If n is
odd, multiply n by 3 and add 1 to get 3n + 1. Repeat the process indefinitely.
The conjecture states that no matter which number you start with, you will
always reach 1 eventually.

Given a number n, return the number of steps required to reach 1.

## Examples
Starting with n = 12, the steps would be as follows:

0. 12
1. 6
2. 3
3. 10
4. 5
5. 16
6. 8
7. 4
8. 2
9. 1

Resulting in 9 steps. So for input n = 12, the return value would be 9.

## Setup

Go through the setup instructions for ECMAScript to
install the necessary dependencies:

http://exercism.io/languages/ecmascript/installation

## Requirements

Install assignment dependencies:

```bash
$ npm install
```
## Making the test suite pass

Execute the tests with:

```bash
$ npm test
```

In the test suites all tests but the first have been skipped.

Once you get a test passing, you can enable the next one by
changing `xtest` to `test`.

## Source
An unsolved problem in mathematics named after mathematician Lothar Collatz [https://en.wikipedia.org/wiki/3x_%2B_1_problem](https://en.wikipedia.org/wiki/3x_%2B_1_problem)

## Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.

Version data entries

55 entries across 55 versions & 1 rubygems

Version Path
trackler-2.2.1.110 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.109 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.108 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.107 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.106 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.105 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.104 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.103 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.102 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.101 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.100 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.99 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.98 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.97 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.96 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.95 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.94 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.93 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.92 tracks/ecmascript/exercises/collatz-conjecture/README.md
trackler-2.2.1.91 tracks/ecmascript/exercises/collatz-conjecture/README.md