non zero result after multiplying with zero.

*To*: mathgroup at smc.vnet.net*Subject*: [mg36420] non zero result after multiplying with zero.*From*: rajgupta121 at rediffmail.com (Raj)*Date*: Fri, 6 Sep 2002 03:16:50 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Hi everybody, When I multiply an expression with 0 it is giving 0.expression which is creating problem in the further calculation. eg. In[1]:=func1[r_]:=Exp[-r/2] In[2]:coeff[[1,1]]=0.0; ; ; In[34]:=func1[r]coeff[[1,1]] Out[34]:=0.Exp[-r/2] I want anything to be multiply by zero must be zero. How can I do that? Your suggestion will be highly appreciated. Thanks in advance, Raj