scheme union of two lists

To perform the union of two lists in Scheme, you can use the append procedure. The append procedure takes multiple lists as arguments and returns a new list that is the concatenation of all the lists.

Here's an example of how you can use the append procedure to find the union of two lists:

(define (union lst1 lst2)
  (append lst1 lst2))

In this example, the union procedure takes two lists, lst1 and lst2, and uses the append procedure to concatenate them together, resulting in the union of the two lists.