20220829c

math modul
==========

https://docs.python.org/3/library/functions.html

    abs(-5)
    round(3.1)


https://docs.python.org/3/library/math.html

    import math


    math.<TAB><TAB>        # Linux alatt

    math.pi

    math.floor(3.99)
    math.ceil(3.2)