What is the “let” keyword in functional languages like F# and OCaml for?

Question

When looking at F#, Ocaml and other functional language code examples I notice that the let keyword is used very often.

• Why do you need it? Why were the langua

Answer 1

The main purpose of "let" is putting a scope around its definitions.

let in

Makes sure that the definitions don't pollute the namespace of anything other than .