Q21836: Length of Strings, String Descriptors in Compiler, Interpreter
Article: Q21836 Product(s): See article Version(s): 1.00 1.01 1.02 2.00 2.01 3.00 4.00 4.00b 4.50 Operating System(s): MS-DOS Keyword(s): ENDUSER | B_BasicCom B_GWBasicI | mspl13_basic Last Modified: 1-AUG-1990 String variables in QuickBASIC versions 1.00 through 4.50 and in Microsoft BASIC Compiler versions 6.00 and 6.00b and in Microsoft BASIC Professional Development System (PDS) versions 7.00 and 7.10 can contain up to 32,767 characters (32K). Each variable-length string variable has a 4-byte string descriptor, which is composed of a 2-byte length followed by a 2-byte address. Fixed-length strings (which were introduced in QuickBASIC versions 4.00 and later and in BASIC compiler 6.00 and later) do not have a string descriptor. For comparison, variable-length string variables in Microsoft GW-BASIC (versions 3.20, 3.22, 3.23) and IBM BASICA Interpreters have 3-byte string descriptors, with 1 byte of length followed by 2 bytes of address. String variables may contain up to 255 characters in GW-BASIC and IBM BASICA.
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