Chapter 11 The OCaml language

5 Constants

constant::= integer-literal
 int32-literal
 int64-literal
 nativeint-literal
 float-literal
 char-literal
 string-literal
 constr
 false
 true
 ()
 beginend
 []
 [||]
 `tag-name

See also the following language extension: extension literals.

The syntactic class of constants comprises literals from the four base types (integers, floating-point numbers, characters, character strings), the integer variants, and constant constructors from both normal and polymorphic variants, as well as the special constants false, true, (), [], and [||], which behave like constant constructors, and begin end, which is equivalent to ().