#testmode:repl
dump : @v { for x in v print(x); for x in v.rev() print(x) }

# list
l = (1, 2, 3)
dump(iter(l))

# dict
d = (first => 1 second => 2 third => 3)
dump(iter(d))
dump(d.keys)

# str
s = "Hello"
dump(iter(s))
",".join(iter(s))
",".join(iter(s).rev)

# int
i = 42
dump(iter(i))

# float
f = 23.5
dump(iter(f))

#---
#1
#2
#3
#3
#2
#1

#1
#2
#3
#3
#2
#1

#first
#second
#third
#third
#second
#first

#H
#e
#l
#l
#o
#o
#l
#l
#e
#H
#"H,e,l,l,o"
#"o,l,l,e,H"

#42
#42

#23.5
#23.5