Re: Displaying results in a column

*To*: mathgroup at smc.vnet.net*Subject*: [mg104988] Re: Displaying results in a column*From*: David Bailey <dave at removedbailey.co.uk>*Date*: Sun, 15 Nov 2009 20:49:56 -0500 (EST)*References*: <hdgr97$jeq$1@smc.vnet.net> <hdlk5v$he1$1@smc.vnet.net> <hdomon$91r$1@smc.vnet.net>

AES wrote: > In article <hdlk5v$he1$1 at smc.vnet.net>, > David Bailey <dave at removedbailey.co.uk> wrote: > >>> {expr1, "\n"expr2, "\n"expr3, "\n"expr4, . . . } >>> >>> seems to work just fine (in putting sequential expressions on sequential lines) >>> > >> Note that as written, you are actually multiplying the subsequent >> expressions by the string "\n"! If one of your expressions happens to >> evaluate to 1, you will get a surprise! You should use Column, as others >> have already pointed out. > > Haven't tried your surprise yet -- but I was surprised to find that > > "\n"expr1a + expr1b and "\n"(expr1a+expr1b) > > functioned differently -- and now I understand why. > > Is multiplying a general expression by a string ("\n") actually legal > syntax? (and if not, should my using it have triggered an error > message?) > Multiplications involving strings just don't evaluate - they are not illegal as such! The surprise was that some basic rules of arithmetic still get applied, which would be inconvenient for your intended use: 1 x <string> = <string> 0 x <string> = 0 David Bailey http://www.dbaileyconsultancy.co.uk