Merge pull request #12 from JulianHentea/54145913_about_regular_expressions_master

Learning about regex

[Delivers #54145913]
Merge pull request #13 from JulianHentea/54145923_about_constants_master

Learned about constants

[Delivers #54145923]
Learned about control statements
  * good review especially  the unless
  * condition operators are nice to know
[#54145927]