September 21 lecture notes - Intro Programming w/ Mathematica

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 I) discuss homework / questions

   1. Yes, it was too hard.
   2. But hey - it's all practice.

 II) new syntax : 

   1.
    Print["The answer is \"" <> ToString[b] <> "\"."];

       \"             is a quote within a quote
       ToString[]     converts something to a string
       <>             joins strings together.

   2.
    Return[stuff];    use this inside a function to exit and return stuff
                      BUT be careful; it jumps all the way out of 
                            Module[{}, 
                                  If[ ... Return[]; 
                                  While[... Return[..]]] 
                      but *not* all the way out of
                            Module[{}, Do[ ... Return[],{...}]
                      Do[] is apparently special; 
                      the Return only jumps out of the Do and not the Module

 III) 
   1. Jim's examples in code/ directory
      * Craps.nb
      * magic_3x3_square.nb
      * hangman.nb
      * fraction_tech_review.nb

 IV)
   assignment for this week : more practice