Example
The function keyword automatically has pattern matching when you define the
body of your function. Observe it below:
# let foo = function
0 -> "zero"
| 1 -> "one"
| 2 -> "couple"
| 3 -> "few"
| _ -> "many";;
val foo : int -> bytes = <fun>
# foo 0;;
- : bytes = "zero"
# foo 3;;
- : bytes = "few"
# foo 10;;
- : bytes = "many"
# let bar = function
"a" | "i" | "e" | "o" | "u" -> "vowel"
| _ -> "consonant";;
val bar : bytes -> bytes = <fun>
# bar "a";;
- : bytes = "vowel"
# bar "k";;
- : bytes = "consonant"
