Re: (2/3)[[1]]

*To*: mathgroup at smc.vnet.net*Subject*: [mg96414] Re: (2/3)[[1]]*From*: Albert Retey <awnl at gmx-topmail.de>*Date*: Fri, 13 Feb 2009 03:42:17 -0500 (EST)*References*: <gn11e8$7vn$1@smc.vnet.net>

Hi, > but why can't Part be used with Rational? > > i.e. (2/3)[[1]] I think because Mathematica was designed/programmed like that. Rationals are atoms, although their FullForm suggests otherwise. So they don't have parts: AtomQ[2/3] You can access the numerator and denominator with the corresponding functions, though: Numerator[2/3] Denominator[2/3] hth, albert