The main difference is Logo has fixed arity and so doesn't need parens. Lisp has variable arity and so needs parens. So in Lisp you can say: > (+ 1 2 3) and

The main difference is Logo has fixed arity and so doesn't need parens. Lisp has variable arity and so needs parens. So in Lisp you can say: > (+ 1 2 3) and it will add all the numbers together. In Logo, you have to say: > 1 + 2 + 3