```sh
handle = array_concat [handle]*
```
Concats all provided arrays and returns a handle to a new array with all items.
Any number of array handles.
A handle to the new array.
```sh
input1 = range 1 4
input2 = range 4 6
input3 = range 6 8
arr = array_concat ${input1} ${input2} ${input3}
```