Begginer's question: Saving a function for later use

*To*: mathgroup at smc.vnet.net*Subject*: [mg128037] Begginer's question: Saving a function for later use*From*: pedro.roberto at campus.ul.pt*Date*: Mon, 10 Sep 2012 04:05:40 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net

Hello, I'm just getting started on Mathematica and trying to define a function for later use. The function is just: test[x_]:=x^2 While I don't close mathematica, I can use the function on my notebooks but when I close it, the function disappers, I tried to save a .m file with it but It didn't work. What do I do? Thanks for time, Pedro

**Follow-Ups**:**Re: Begginer's question: Saving a function for later use***From:*Rodrigo AP <digorna@gmail.com>

**Re: Begginer's question: Saving a function for later use***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: Begginer's question: Saving a function for later use***From:*Joug Raw <jougraw@gmail.com>