Places an item of the same type as parameters 1-n onto the stack.

This function combines two or more lists of the same type into a new list containing all of the distinct items.

It takes each of the lists, plus a single constant with the number of lists to be processed.

So for example, if there were three lists on the stack…

• A: [Orange, Yellow, Red]
• B: [Blue, Green, Red]
• C: [Purple, Pink, Blue]

The function 3 APPENDN would read the three lists and append them together, resulting in a single list containing…

Orange, Yellow, Red, Blue, Green, Purple Pink

APPEND
ZIP