google spreadsheet: join arrays using function NOT CODE

Question

I have one array

1 
2
3

another array

4
5
6

How do I use one function to join the 2 arrays?

Answer 1

I'm noticing this is an older question, so this might not have existed when previous responses were written.

You're looking for the JOIN() formula.

(Documentation link)

Sample Usage

JOIN(" and-a ",{1,2,"1 2 3 4"})

JOIN(",",{1,2,3},{4;5;6})

JOIN("-",A1:A100)

Syntax

JOIN(delimiter, value_or_array1, [value_or_array2, ...])

delimiter - The character or string to place between each concatenated value.

delimiter may be specified as blank, e.g. JOIN(,{1,2,3}). value_or_array1 - The value or values to be appended using delimiter.

value_or_array2, ... - [ OPTIONAL ] - Additional value or array to be appended using delimiter.