Challenge require knowledge that are not yet introduced

[NyteSyntax]

Following the rules that are applied to every challenge:

• Try to use only the information given up to this point in this book.
• Try not to give up until you've given it a solid attempt

Challenge 4 in the command line arguments section require writing the result to a file and the book not yet talked about working with files.

[bowbahdoe]

good catch - maybe i just move the cli args section down? Either way, its on the list

[NyteSyntax]

good catch - maybe i just move the cli args section down? Either way, its on the list

Yeah I think it's a good idea to move the cli args section down. Most of cli apps is working with files.