Vector Basic Interpreter Basic 80, Reference Manual, Page: 22 / 190

1.9.3 Loqieal
Opera~ors
Logical opera~ors perform tes~s on multiple relations, bit
manipulation, or Boolean operations. The logical operator
returns a bitwise result which is either "true" (not zero)
or "false" (zero). In an expression, logical operations are
performed after a:ithmetic and relational operations. The
outcome of a logieal operation is de~ermined
as
shown in the
following table. The operators are listed in order of
precedence.
NOT
X NOT X
1 0
0 1
AND
X
y
X AND
y
1
1 1
1 0 0
0
1
0
0 0 0
OR
X
Y X OR Y
1 1 1
1 0 1
0
1
1
0 0 0
XOR
X
Y
X XOR Y
1 1 0
1 0 1
0
1 1
0 0 0
IMP
X
Y X IMP Y
1
1 1
1 0 0
0 1 1
0
0 1
EQV
X
Y
X EQV
y
1
1 1
1 0 0
0
1
0
a a
1
Just as the relational operators can be used to make
decisions regarding program flow, logical operators can
connect two or more relations and return a true or false
value to be used in a decision (see IF, Section 2.26). For