Ada Reference Manual (Ada 2022)
2.5 Character Literals
A character_literal is formed by enclosing a graphic character between two apostrophe characters.
Syntax
character_literal ::= 'graphic_character'
NOTE A character_literal is an enumeration literal of a character type. See 3.5.2.
Examples
Examples of character literals:
'A' '*' ''' ' '
'L' 'Л' 'Λ' -- Various els.
'∞' 'א' -- Big numbers - infinity and aleph.
'L' 'Л' 'Λ' -- Various els.
'∞' 'א' -- Big numbers - infinity and aleph.