Fuction definition

*To*: mathgroup at smc.vnet.net*Subject*: [mg73635] Fuction definition*From*: bar at ANTYSPAM.ap.krakow.pl*Date*: Fri, 23 Feb 2007 04:42:59 -0500 (EST)*Organization*: Akademia Pedagogiczna w Krakowie

Hi When I try : ------------------ p = 1; f1[x_] := p Sin[Pi x]; p = 2; f2[x_] := p Sin[Pi x]; f1[0.5] f2[0.5] Out[26]=2. Out[27]=2. ----------------- When I use = instead of := it works OK. Why ? It is safely to use "=" in function definition ? I have to integrate and differentiate such function in the future. In my case function depends on about 20 parameters, which are calculated three times, (I want to obtain three functions) I'm not sure is this good idea to use '=' ? Regards , Olaf

**Follow-Ups**:**Re: Re: Fuction definition***From:*"Chris Chiasson" <chris@chiasson.name>

**Re: Fuction definition***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: Fuction definition***From:*János <janos.lobb@yale.edu>