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strange behavior

• To: mathgroup at smc.vnet.net
• Subject: [mg104787] strange behavior
• From: Jason Winters <Jason_member at nntpjunkie.com>
• Date: Tue, 10 Nov 2009 05:58:05 -0500 (EST)

Hi!  I am wondering why these two modules behave differently


Module[{ans = ""},
  For[i = 1, i < 10, i++,
    ans = InputString["Enter a String"];
    Print[ans]
    ]
  ]


and


Module[{ans = ""},
  For[i = 1, i < 10, i++,
    ans = InputString["Enter a String"]
    Print[ans]
    ]
  ]


One prints out a bunch of extraneous Null's

Also is there anyway to type variable in Mathematica  i.e. declare i to be and
integer or string or whatever.


Thanks for any help you can give.  
Sorry for the simpleness of these questions.

Thanks

• Follow-Ups:
  • Re: strange behavior
    • From: Murray Eisenberg <murray@math.umass.edu>
  • Re: strange behavior
    • From: DrMajorBob <btreat1@austin.rr.com>