char-name character => name
character---a character.
name---a string or nil.
Returns a string that is the name of the character, or nil if the character has no name.
All non-graphic characters are required to have names unless they have some implementation-defined attribute which is not null. Whether or not other characters have names is implementation-dependent.
The standard characters <Newline> and <Space> have the respective names "Newline" and "Space". The semi-standard characters <Tab>, <Page>, <Rubout>, <Linefeed>, <Return>, and <Backspace> (if they are supported by the implementation) have the respective names "Tab", "Page", "Rubout", "Linefeed", "Return", and "Backspace" (in the indicated case, even though name lookup by "#\" and by the function name-char is not case sensitive).
(char-name #\ ) => "Space" (char-name #\Space) => "Space" (char-name #\Page) => "Page" (char-name #\a) => NIL OR=> "LOWERCASE-a" OR=> "Small-A" OR=> "LA01" (char-name #\A) => NIL OR=> "UPPERCASE-A" OR=> "Capital-A" OR=> "LA02" ;; Even though its CHAR-NAME can vary, #\A prints as #\A (prin1-to-string (read-from-string (format nil "#\\~A" (or (char-name #\A) "A")))) => "#\\A"
Should signal an error of type type-error if character is not a character.
section name-char [Function] , section Printing Characters
Non-graphic characters having names are written by the Lisp printer as "#\" followed by the their name; see section Printing Characters.
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