Re: Precision

*To*: mathgroup at smc.vnet.net*Subject*: [mg129347] Re: Precision*From*: "djmpark" <djmpark at comcast.net>*Date*: Mon, 7 Jan 2013 00:36:34 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net*References*: <26233050.16908.1357370556506.JavaMail.root@m06>

To permanently change your number display use Menu -> Edit -> Preferences, then the Appearance, Numbers tab and set the display you wish. For custom formatting within a notebook use NumberForm and its options. Note that the purpose of N is to convert an exact number to an approximate number and it is not intended for number formatting. David Park djmpark at comcast.net http://home.comcast.net/~djmpark/index.html From: Rob Ryan [mailto:tio540s1 at gmail.com] My frustration is growing. I simply want to add (for example): 103971.66+52282.64+2998.27. These are dollars and cents and I'd like to keep the cents. But when I input that line, I get 159923. When I input: N[(103971.66+52282.64+2998.27),20] I STILL get 159923. What do I do to get 159952.57? I've used "SetPrecision", etc. with still no result. I note that when I type 103971.66 and hit shift-return, the output is 103972. If I then type "InputForm[%]" I get 103971.66. There simply has to be an easy way to add these numbers - any calculator watch can do it!