# Module Char

    module Char: sig .. end

Character operations.

    val code : char -> int

Return the ASCII code of the argument.

    val chr : int -> char

Return the character with the given ASCII code.

- Raises `Invalid_argument` if the argument is outside the range 0--255.

    val escaped : char -> string

Return a string representing the given character, with special characters escaped following the lexical conventions of OCaml. All characters outside the ASCII printable range (32..126) are escaped, as well as backslash, double-quote, and single-quote.

    val lowercase : char -> char

Deprecated. Functions operating on Latin-1 character set are deprecated.

Convert the given character to its equivalent lowercase character, using the ISO Latin-1 (8859-1) character set.

    val uppercase : char -> char

Deprecated. Functions operating on Latin-1 character set are deprecated.

Convert the given character to its equivalent uppercase character, using the ISO Latin-1 (8859-1) character set.

    val lowercase_ascii : char -> char

Convert the given character to its equivalent lowercase character, using the US-ASCII character set.

- Since 4.03.0

    val uppercase_ascii : char -> char

Convert the given character to its equivalent uppercase character, using the US-ASCII character set.

- Since 4.03.0

    type t = char

An alias for the type of characters.

    val compare : t -> t -> int

The comparison function for characters, with the same specification as `compare`. Along with the type `t`, this function `compare` allows the module `Char` to be passed as argument to the functors `Set.Make` and `Map.Make`.

    val equal : t -> t -> bool

The equal function for chars.

- Since 4.03.0