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RE: Q: lefthand/right hand side of equation

• To: mathgroup at smc.vnet.net
• Subject: [mg26927] RE: [mg26872] Q: lefthand/right hand side of equation
• From: "David Park" <djmp at earthlink.net>
• Date: Fri, 26 Jan 2001 23:30:04 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

First, I got rid of the List brackets around your equation.

eqn = a + b == c + d;

l = First[eqn]
r = Last[eqn]
a + b
c + d

or

l = eqn[[1]]
r = eqn[[2]]
a + b
c + d

Check out Section 2.1 Expressions, and especially 2.1.4 Parts of Expressions
in the Book.

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/



> From: Robert [mailto:robert.schuerhuber at gmx.at]
To: mathgroup at smc.vnet.net
> hello!
> maybe a rather simple question:
>
> if i have an equation, how can i get the left/right hand side?
>
> e.g.
>
> eqn={a+b==c+d};
>
> i'd like to get something like:
>
> l=a+b
> r=c+d
>
> thanks,
>
> robert