decrementing problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg72293] decrementing problem*From*: jltrahan at mail.usf.edu*Date*: Mon, 18 Dec 2006 06:56:25 -0500 (EST)

Hi, I am having a really difficult time with decrementing values in my For loop. I have tried i--, --i, i-=1, i=i-1, and nothing is working. The loop is as follows: For[i=n-1, i<=1, i--, summ=0; For[j=i+1, j<=n, j++, summ=summ + U[[i,j]]*X[[j]]] ] When I try to print i or j, nothing shows up. Can anyone please help? Thank you in advance, Jamie

**Follow-Ups**:**Re: decrementing problem***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: decrementing problem***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: decrementing problem***From:*János <janos.lobb@yale.edu>

**Re: decrementing problem***From:*János <janos.lobb@yale.edu>