Futurebasic/Language/Reference/xor

XOR

Syntax

result& = exprA {XOR | ^^} exprB

Description

Expression exprA and expression exprB are each interpreted as 32-bit integer quantities. The XOR operator performs a "bitwise comparison" of each bit in exprA with the bit in the corresponding position in exprB. The result is another 32-bit quantity; each bit in the result is determined as follows:

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A common use for XOR is to toggle the state of individual bits in a bit pattern. For example:

   pattern& = pattern& XOR BIT(7)

This flips bit 7 in pattern& from 0 to 1 or from 1 to 0, and leaves all of pattern&'s other bits alone.

Example

The example below shows how bits are manipulated with XOR:

DEFSTR LONG
PRINT BIN$(923)
PRINT BIN$123)
PRINT "--------------------------------"
PRINT BIN$(923 XOR 123)

program output:
<code>00000000000000000000001110011011
00000000000000000000000001111011
--------------------------------
00000000000000000000001111100000

See Also

AND; OR; NOT