1	#!/bin/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
15	### let with ()
16	let x=( 1 )
17	let y=( x + 2 )
18	let z=( y * 3 )
19	echo $x $y $z
20	# stdout: 1 3 9
21	# N-I mksh/zsh stdout-json: ""