factorial.py modified with content

[vassiki]

finished the in class homework

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@0f001e7). Click here to learn what that means.
The diff coverage is 28.57%.

@@          Coverage Diff           @@
##             master    #3   +/-   ##
======================================
  Coverage          ?   50%           
======================================
  Files             ?     1           
  Lines             ?    12           
  Branches          ?     2           
======================================
  Hits              ?     6           
  Misses            ?     4           
  Partials          ?     2

Impacted Files	Coverage Δ
factorial.py	50% <28.57%> (ø)

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