⇐ Index ⇐ Strings
Concat4(“abc” “def” “ghi” “jkl”) ->twelveLetters
Takes the top four items from the stack, treates them as strings, and concatenates them to a single string.
Trace(Concat4("abc" "def" "ghi" "jkl")) # Prints "abcdefghijkl"
⇐ Index