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Re: How to force numeric output

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115617] Re: How to force numeric output
  • From: KenR <ramsey2879 at msn.com>
  • Date: Sun, 16 Jan 2011 05:55:08 -0500 (EST)
  • References: <igrqb1$qmq$1@smc.vnet.net>

On Jan 15, 4:45 am, KenR <ramsey2... at msn.com> wrote:
> I am new to Mathematica and cant seem to get it to give a numeric
> answer to
>
>  input    y = 5; x = floor[sqrt[y+1.0]]; x.
>
> instead of a numeric it gives "out floor[sqrt[6.0]]"
>
> what am I doing wrong?
>
> I have Mathematica 8.0
>
> Thankyou, Kenneth Ramsey

I was looking at past posts and came upon a similar situation.  Thanks
to those who e-mail me I am aware that the functions Floor and Sqrt
must be capitalized.  It still apparently will not work because
Mathematica does not know whether a positive or negative answer is
desired.

A similar situation was posted below where the sqrt of meter^2 etc was
desired. A reader responded to write the code "Assuming[
{Positive[Meter], Positive[Second]},
  Refine[(Sqrt[Meter^2/Second^2] Second)/Meter^2]

How would I invoke a similar solution to my case?


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