Basic Examples
Compute a factorial:
I
n
[
1
]
:
=
E
v
a
l
u
a
t
e
R
e
c
u
r
s
o
r
R
e
c
u
r
s
o
r
E
x
a
m
p
l
e
s
[
"
F
a
c
t
o
r
i
a
l
"
]
,
6
O
u
t
[
1
]
=
7
2
0
Draw its syntax tree:
I
n
[
2
]
:
=
R
e
c
u
r
s
o
r
P
r
o
g
r
a
m
T
r
e
e
R
e
c
u
r
s
o
r
E
x
a
m
p
l
e
s
[
"
F
a
c
t
o
r
i
a
l
"
]
O
u
t
[
2
]
=
