Is there a "lhs" and "rhs" function in Mathematica that is similar to Maple?

Question

In Maple, we can use "lhs" and "rhs" functions to retrieve the left or right hand side of an equation, but I can find a similar one in Mathematica. Could anyone suggest how to do this in Mathematica?

Thanks a lot.

Answer 1

See if you can adapt this.

I name an equation e1 in this way

e1 = x==y

Then the lhs of e1 is

e1[[1]]

which returns

x

and the rhs of e1 is

e1[[2]]

which returns

y