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Re: Mathematica bugs?

• To: mathgroup at smc.vnet.net
• Subject: [mg67312] Re: Mathematica bugs?
• From: john2 <john2 at 8889.fsnet.co.uk>
• Date: Sun, 18 Jun 2006 05:12:55 -0400 (EDT)
• References: <e70f29$rf4$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

Yaroslav Bulatov wrote:
> When I run the following line
> x = Pi/4; For[i = 0, i < 56, i += 1, x = 2*Abs[x - 1/2]]; N[x]
> I get
> 3.
> 
> But x should always stay between 0 and 1, why do I get 3?

Try this:
For[i=0,i<56,i+=1,x=2*Abs[x-1/2];Print[N[x]]]
and the problem is fairly obvious

john2