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 3.6.1.2 Characters
 ..................
 
 A single character may be written as a single quote immediately
 followed by that character.  The same escapes apply to characters as to
 strings.  So if you want to write the character backslash, you must
 write `'\\' where the first `\' escapes the second `\'.  As you can
 see, the quote is an acute accent, not a grave accent.  A newline
 immediately following an acute accent is taken as a literal character
 and does not count as the end of a statement.  The value of a character
 constant in a numeric expression is the machine's byte-wide code for
 that character.  `as' assumes your character code is ASCII: `'A' means
 65, `'B' means 66, and so on.
 

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