Instructions.md

instructions

Great to see you here 🎉 Following these instructions you should be able to solve this exercise.

The problem - Collatz conjecture

In this exercise we will look at the Collatz conjecture and the related Collatz sequence.

The Collatz conjecture is an unproven mathematical conjecture, stating that the Collatz sequence of any positive integer x will eventually reach 1.

The Collatz sequence is a sequence of numbers, generated by applying a function to the current value to receive the next value. The next value in the Collatz sequence following a current integer x is given by:

Exercise

Your job is to implement a collatz_sequence function that returns the Collatz sequence up to the integer 1 of a given integer. This sequence shall be returned as a python list.

Implement this in the collatz.py file.

Example

Here are some example results your function should return

>>> collatz_sequence(1)
[1]

>>> collatz_sequence(2)
[2, 1]

>>> collatz_sequence(3)
[3, 10, 5, 16, 8, 4, 2, 1]

Test

To test your implementation, this exercise comes with a predefined test suite. To run this test suite, execute the collatz.test.py file in this folder with python3:

python3 collatz.test.py