Re: fastest way to add up a billion numbers

*To*: mathgroup at smc.vnet.net*Subject*: [mg73898] Re: [mg73880] fastest way to add up a billion numbers*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sat, 3 Mar 2007 00:50:04 -0500 (EST)*Reply-to*: hanlonr at cox.net

Sum[n,{n,m}]/.m->10^9 500000000500000000 Bob Hanlon ---- Raj <rajanikanth at gmail.com> wrote: > hi! > > Could somebody tell me what would be the fastest way to add up a > billion numbers(from 1 to 10^9 i.e the first billion numbers) in > Mathematica? > > Ofcourse the answer is n(n+1)/2, but is there any other way in > Mathematica other than the following one: > > Total@@Range[10^9] > > Thanks, > > Raj >