[julia-users] Why is julia interpreting what's inside a string?

[J Luis]

I need to create these, not to interpret what julia thinks it means.

julia> "3.2 3.6 z(x,y) = x@~\327@~exp(-x@+2@+-y@+2@+)"
ERROR: syntax: invalid UTF-8 sequence

julia> "grdmath $ DDX"
ERROR: syntax: invalid interpolation syntax: "$ "

How do I do that?

Thanks