3 ms·
`let` defines a value. Some values are "plain old values", some are functions. The syntax is `let <constantname> <parameters> = <value> in <expression>;;` wher
by javcasas 1y ago
`let` defines a value. Some values are "plain old values", some are functions.
The syntax is `let <constantname> <parameters> = <value> in <expression>;;`
where `expression` can also have `let` bindings.
So you can have
let one = 1 in
let two = 2 in
let three = one + two in
print_endline (string_of_int three);;
- jallmann 1y agoThe way I always think about it is in terms of scope. With: let x = v in expr `x` is now available for use in `expr` In essence, an OCaml program is a giant recursive expression, because `expr` can have its own set of let definitions. In the REPL, this is where the double semicolons come in, as a sort of hint to continue processing after the expression.