Welcome to utop version 2.13.1 (using OCaml version 4.13.1)!

utop[0]> 1 + 3;;
- : int = 4
utop[1]> max 10 34
;;
- : int = 34
utop[2]> [1; 2; 3];;
- : int list = [1; 2; 3]
utop[3]> 1 :: 2 :: [];;
- : int list = [1; 2]
utop[4]> 1 = 3;;
- : bool = false
utop[5]> 1 = 1;;
- : bool = true
utop[6]> 1;;
- : int = 1
utop[7]> 1.1;;
- : float = 1.1
utop[8]> "ste";;
- : string = "ste"
utop[9]> 'a';;
- : char = 'a'
utop[10]> max;;
- : 'a -> 'a -> 'a = <fun>
utop[11]> fun x -> x +3;;
- : int -> int = <fun>
utop[12]> (fun x -> x +3) 10;;
- : int = 13
utop[13]> let f = fun x -> x +3;;
val f : int -> int = <fun>
utop[14]> f 10;;
- : int = 13
utop[15]> f;;
- : int -> int = <fun>
utop[16]> 1;;
- : int = 1
utop[17]> f 1;;
- : int = 4
utop[18]> f (4 + 4);;
- : int = 11
utop[19]> max 30 12 * 3;;
- : int = 90
utop[20]> max 30 (12 * 3);;
- : int = 36
utop[21]> 1 + 4;;
- : int = 5
utop[22]> (+);;
- : int -> int -> int = <fun>
utop[23]> (+) 2 3;;
- : int = 5
utop[24]> 2 + 3;;
- : int = 5
utop[25]> 2.8;;
- : float = 2.8
utop[26]> 3.14e-3;;
- : float = 0.00314
utop[27]> 3.14e-10;;
- : float = 3.14e-10
utop[28]> 1.2 +. 3.4;;
- : float = 4.6
utop[29]> 10 mod 3;;
- : int = 1
utop[30]> 10 mod 2;;
- : int = 0
utop[31]> succ 4;;
- : int = 5
utop[32]> pred 4;;
- : int = 3
utop[33]> false;;
- : bool = false
utop[34]> true;;
- : bool = true
utop[35]> (2 = 2) && (3 = 3);;
- : bool = true
utop[36]> (2 = 3) && (3 = 3);;
- : bool = false
utop[37]> (2 = 3) || (3 = 3);;
- : bool = true
utop[38]> not ((2 = 3) || (3 = 3));;
- : bool = false
utop[39]> let l1 [1; 2; 3];;
Error: Syntax error
utop[40]> let l1 = [1; 2; 3];;
val l1 : int list = [1; 2; 3]
utop[41]> let l2 = [1; 2; 3];;
val l2 : int list = [1; 2; 3]
utop[42]> l1 = l2;;
- : bool = true
utop[43]> l1 == l2;;
- : bool = false
utop[44]> l3 = l1;;
Error: Unbound value l3
utop[45]> let l3 = l1;;
val l3 : int list = [1; 2; 3]
utop[46]> l1 = l3;;
- : bool = true
utop[47]> l1 == l3;;
- : bool = true
utop[48]> 6 :: l1;;
- : int list = [6; 1; 2; 3]
utop[49]> l1;;
- : int list = [1; 2; 3]
utop[50]> (* gregerge *)
;;
utop[51]> if 3 = 4 then "no" else "yes";;
- : string = "yes"
utop[52]> if 3 = 2 then "no" else "yes";;
- : string = "yes"
utop[53]> if 3 = 3 then "no" else "yes";;
- : string = "no"
utop[54]> if 3 = 3 then "no" else 3;;
Error: This expression has type int but an expression was expected of type
         string
utop[55]>