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The following table shows the lexical classes that correspond to the values of class number.
Refer to the ASCII Codes table for the numbers that correspond to each character.
Class Number | Lexical Class |
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0 | Extended characters with a <Command> or <Option> key prefix (codes 128 through 255) | 1 | Non-displayable ASCII characters (codes 0 to 31 excluding 9 through 13) | 2 | White space characters: Space, Tab, Carriage Return, Form Feed, Newline, and Vertical Tab (codes 32, 9, 13, 12, 10, and 11, respectively) | 3 | Digits 0 through 9 | 4 | Uppercase characters A through Z | 5 | Lowercase characters a through z | 6 | All printable ASCII non-alphanumeric characters |
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