Re: How to force numeric output

*To*: mathgroup at smc.vnet.net*Subject*: [mg115635] Re: How to force numeric output*From*: DrMajorBob <btreat1 at austin.rr.com>*Date*: Mon, 17 Jan 2011 05:37:32 -0500 (EST)

"It still apparently will not work because Mathematica does not know whether a positive or negative answer is desired." WHAT will not work? THIS IS YOUR CASE (the only one you've told us about): y = 5; x = Floor[Sqrt[y + 1.0]]; x 2 The result is numeric, it's positive, it's correct, and it has nothing to do with the Meter > 0 && Second > 0 situation from the other post. Bobby On Sun, 16 Jan 2011 04:55:08 -0600, KenR <ramsey2879 at msn.com> wrote: > 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? > -- DrMajorBob at yahoo.com