google spreadsheet: join arrays using function NOT CODE - arrays

Question

I have one array
1
2
3
another array
4
5
6
How do I use one function to join the 2 arrays?
1
2
3
4
5
6

Answer 1

Let's say your arrays are:
A1:A3 = {1;2;3} and B1:B3 = {4;5;6}
Write somewhere: ={A1:A3;B1:B3}
Semicolons ; are used to separate rows, and commas , are for columns.
Here is the documentation: Using arrays in Google Sheets

Answer 2

TRANSPOSE() //takes matrix as argument and returns transposed matrix
SPLIT() //breaks apart a string based on a delimiter character (char(13) here)
ARRAYFORMULA() //applies the formula within to array vs cell
CONCATENATE() //joins each cell in each range with a char(13), then the next cell...then the next matrix of cells (to which the first process also happens)
//note char(13) is a carriage return, i will call CR for ease
so if you have matrix A : 1, 2, 3
and matrix B : 4, 5, 6
the steps would look like this:
TRANSPOSE(SPLIT(ARRAYFORMULA(CONCATENATE("1CR2CR3CR" ; "4CR5CR6CR")), CR))
TRANSPOSE(SPLIT("1CR2CR3CR4CR5CR6CR", "CR"))
TRANSPOSE({"1","2","3","4","5","6"})
finally:
1
2
3
4
5
6

Answer 3

=FLATTEN(A1:A3,B1:B3) should do the trick

Answer 4

=filter({A1:A;B1:B}, {A1:A;B1:B}<>"")

Answer 5

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.

Answer 6

Given the information provided by Mr.Monshaw, I figured this out for you.
Given values "1,2,3" are in cells A1:A3 of a spreadsheet, and values "4,5,6,7" are in cells B1:B4. Here is the formula to use:
=TRANSPOSE(SPLIT(ARRAYFORMULA(CONCATENATE(concat(A1:A3,",");concat(B1:B4,","))),","))
Explanation.
The concat formula creates a string of the values with the indicated separator, ",". So concat(A1:A3,",") results in "1,2,3".
The Concatenate combines the values of the specified array as one string. So CONCATENATE(concat(A1:A3,",");concat(B1:B4,",")) results in "1,2,3,4,5,6,7"
The Split function here is used to identify the "," as a deliminator and not a value in the array. The Transpose will cause the results to display in a column instead of in a row.

Answer 7

I found this even easier...
=ARRAYFORMULA({A:A;B:B})