copy
0 1 3 2 # 1 2 3 4
1 0 1 # 3 4 $ i. 12
1 0 1 # i. 3 4
i. 3 4 5
2 # 1 2 3 4
2 + 1 2 3 4 
1 2 # 1 2 3 4
# 3 4 $ i. 12
txt =:'Now is the time to do the work'
(' ' ~:txt)#txt
ls =: 2 _10 3 _100
(ls >: 0)#ls
foo =: 3 4 $ i. 12
foo
$foo
#$foo
s =: $foo
#$s
w
s
foo
+/ "0 foo
+/ "1 foo
+/ "2 foo
+/  foo
3 ( 3:'x+y') 4
3 monad def 'x+y' 4
3 ( 4:'x+y') 4
dyad
3 dyad def 'x+y' 4
dyad def 'x+y'
3 ( 4 :'x+y') 4
4: 39
4: foo
{. foo
}. foo
foo
txt
txt i.
txt i.' '
(' '=txt)#i.$txt
txt
$txt
i.$txt
(' '=txt)
-. 0 1
0 1 +. / 0 1
0 1 *./ 0 1
0 1 ~: / 0 1
0 1 0: / 0 1
0 1 (0: /) 0 1
txt
;/ txt
'hi' ; 'there'; i. 10