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Unicode characters

OPTION CHARACTER MULTIBYTE
This option statement enables Unicode characters.
The scope of this statement is the program unit where it is written. When this is written, the behavior of substring operations, POS-functions, CHR$-functions, ORD-functions, LEN-functions and CHARACTER INPUT statements are altered.

OPTION CHARACTER BYTE
This option statement disables Unicode characters.
The scope of this statement is the program unit where it is written. Every byte is assumed to be a character even if its ordinal exceeds 127.
Note that Full BASIC standardizes only characters of which ordinal is less than 128.
When you manipulate byte strings or a byte file, you must write these in the program units where substring operations, POS-functions, CHR$-functions, ORD-functions, LEN-functions or CHARACTER INPUT statements are used.