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My BASIC Quick Reference Guide


TYPE: Logical Operator
FORMAT: <operand> OR <operand>

Action: Just as the relational operators can be used to make decisions regarding program flow, logical operators can connect two or more re-lations and return a true or false value which can then be used in a decision. When used in calculations, the logical OR gives you a bit result of I if the corresponding bit of either or both operands is 1.

This will produce an integer as a result depending on the values of the operands. When used in comparisons the logical OR operator is also used to link two expressions into a single compound expression. If either of the expressions are true, the combined expression value is true (-1). In the first example below if AA is equal to BB OR if XX is 20, the expression is true.

Logical operators work by converting their operands to 16-bit, signed, two's complement integers in the range of -32768 to +32767. If the operands are not in the range an error message results. Each bit of the result is determined by the corresponding bits in the two operands.
EXAMPLES of OR Operator:

100 IF (AA=BB) OR (XX=20) THEN...
230 KK%=64 OR 32: PRINT KK% (You typed this with a bit value of 1000000 for 64 and 100000 for 32)
96 (The computer responded with bit value 1100000. 1100000=96.)

Commodore Cheetah made by Allen Monks, started in the year 2000.