3 4
5 6 7 8 9
7 8 9
/usr/chet
/usr/chet
/usr/chet
/a/b/c
/usr/chet
/usr/chet 7
/a/b/c 9 /a/b/c
/a/b/c 9 /a/b/c
/a/b/c /a/b/c
1 2
1 1
unset
toronto airport
AVAR
song by rush
BVAR
toronto airport
AVAR
AVAR
42
/bin:/usr/bin:/usr/local/bin:.
avar=([0]="/bin:/usr/bin:/usr/local/bin:.")
z=yy
42
declare -i ivar="10"
unset
declare -x ivar="42"
hB
braceexpand:hashall:interactive-comments
hBP
braceexpand:hashall:interactive-comments:physical
declare -r SHELLOPTS="braceexpand:hashall:interactive-comments:physical"
abcde
20
30
40
50
|0|10|
10
|0|10|
10
|0|10|
10
|4|
4
|0|11|
after fff3: x=4
|0|12|
|y|
|y|
a:b:c:d
a-b-c-d
a:b:c:d
g: , 
f: , 
FIN: asdf fdsa, asdf fdsa
g: v = , w =
f: v = , w =
FIN: v = two, w = one
declare -Ar FOOBAR='([foo]="bar" )'
declare -Ar FOOBAR='([foo]="bar" )'
declare -ar FOOBAR2='([0]="bar")'
declare -ar FOOBAR2='([0]="bar")'
F OUTSIDE
F OUTSIDE
a=z
a=b
a=z