1	#!/usr/bin/env bash
2	#
3	# let arithmetic.
4
5	#### let
6	# NOTE: no spaces are allowed. How is this tokenized?
7	let x=1
8	let y=x+2
9	let z=y*3 # zsh treats this as a glob; bash doesn't
10	let z2='y*3' # both are OK with this
11	echo $x $y $z $z2
12	## stdout: 1 3 9 9
13	## OK zsh stdout-json: ""
14	## OK zsh status: 1
15
16	#### let with ()
17	let x=( 1 )
18	let y=( x + 2 )
19	let z=( y * 3 )
20	echo $x $y $z
21	## stdout: 1 3 9
22	## status: 0
23	## N-I mksh/zsh stdout-json: ""
24	## N-I mksh/zsh status: 1