Join the items in {list} together into one String. When {sep} is specified it is put in between the items. If {sep} is omitted a single space is used. Note that {sep} is not added at the end. You might want to add it there too: let lines = join(mylist, "\n") . "\n" String items are used as-is. |Lists| and |Dictionaries| are converted into a string like with |string()|. The opposite function is |split()|. Can also be used as a |method|: mylist->join()