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Beginner--Need to test and check real input values

• To: mathgroup at smc.vnet.net
• Subject: [mg71564] Beginner--Need to test and check real input values
• From: abdou.oumaima at hotmail.com
• Date: Thu, 23 Nov 2006 05:41:35 -0500 (EST)

Hello Math Group,

I'm using While to control a flow of input values. I need to give a positive and real value to a variable, let's call it "c" . I write the code bellow but when I excute it, I can put a string value and can return it. How can I control that please.

c = 0;
While[! (RealQ[c] && 0 < c < 0.9), c = Input["Give a positive real value to c 
  less than 0.9"]]
Print["c= ", c]

Greetings.
Lian.

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