maths.persistence
=================

.. py:module:: maths.persistence


Functions
---------

.. autoapisummary::

   maths.persistence.additive_persistence
   maths.persistence.multiplicative_persistence


Module Contents
---------------

.. py:function:: additive_persistence(num: int) -> int

   Return the persistence of a given number.

   https://en.wikipedia.org/wiki/Persistence_of_a_number

   >>> additive_persistence(199)
   3
   >>> additive_persistence(-1)
   Traceback (most recent call last):
       ...
   ValueError: additive_persistence() does not accept negative values
   >>> additive_persistence("long number")
   Traceback (most recent call last):
       ...
   ValueError: additive_persistence() only accepts integral values


.. py:function:: multiplicative_persistence(num: int) -> int

   Return the persistence of a given number.

   https://en.wikipedia.org/wiki/Persistence_of_a_number

   >>> multiplicative_persistence(217)
   2
   >>> multiplicative_persistence(-1)
   Traceback (most recent call last):
       ...
   ValueError: multiplicative_persistence() does not accept negative values
   >>> multiplicative_persistence("long number")
   Traceback (most recent call last):
       ...
   ValueError: multiplicative_persistence() only accepts integral values