1	#!/usr/bin/env bash
2	#
3	# Constructs borrowed from ksh. Hm I didn't realize zsh also implements these!
4	# mksh implements most too.
5
6	#### C-style for loop
7	n=10
8	for ((a=1; a <= n ; a++)) # Double parentheses, and naked 'n'
9	do
10	if test $a = 3; then
11	continue
12	fi
13	if test $a = 6; then
14	break
15	fi
16	echo $a
17	done
18	## status: 0
19	## STDOUT:
20	1
21	2
22	4
23	5
24	## END
25
26	#### For loop with and without semicolon
27	for ((a=1; a <= 3; a++)); do
28	echo $a
29	done
30	for ((a=1; a <= 3; a++)) do
31	echo $a
32	done
33	## status: 0
34	## STDOUT:
35	1
36	2
37	3
38	1
39	2
40	3
41	## END
42
43	#### Empty init
44	i=1
45	for (( ;i < 4; i++ )); do
46	echo $i
47	done
48	## status: 0
49	## STDOUT:
50	1
51	2
52	3
53	## END
54
55	#### Empty init and cond
56	i=1
57	for (( ; ; i++ )); do
58	if test $i = 4; then
59	break
60	fi
61	echo $i
62	done
63	## status: 0
64	## STDOUT:
65	1
66	2
67	3
68	## END
69
70	#### Infinite loop with ((;;))
71	a=1
72	for (( ; ; )); do
73	if test $a = 4; then
74	break
75	fi
76	echo $((a++))
77	done
78	## status: 0
79	## STDOUT:
80	1
81	2
82	3
83	## END