split/join lists -> E492

Question

I'm trying to join a list within a function like this:

let mylist=split(globpath(&rtp, 'custompath/*'))
mylist=join(mylist,"\n")

But I'm getting:

E492: Not an editor command:     mylist=join(mylist,"\n")

I'm sure I'm missing something fundamental...

Answer 1

mylist=.. is not a command. You want to let the variable, e.g. let mylist=...