Radio Shack TRS-80 Model 4 - Page 172

IF A$ < B$ THEN 50
if string A$ alphabetically precedes string B$, then the program
branches to line 50.
IF R$ = "YES" THEN PRINT A$
if R$ equals YES then the message stored as A$ is printed.
However, you may also use relational expressions simply to return the
true or false results of a test. For example:
PRINT 7 = 7
prints - 1 since the relation tested is true.
PRINT "A" > "B"
prints 0 because the relation tested is false.
Logical Operators
Logical operators make logical comparisons. Normally, they are used
in IFtTHEN statements to make a logical test between two or more
relations. For example:
IF A = 1
OR C = 2
THEN PR I NT }{
The logical operator, OR, compares the two relations A = 1 and
C
= 2.
Logical operators may also be used to make bit comparisons of two
numeric expressions.
For this application, BASIC does a bit-by-bit comparison of the two
operands, according to predefined rules for the specific operator.
NOTE: The operands are converted to integer type, stored internally
as 16-bit, two's complement numbers. To understand the results of
bit-by-bit comparisons, you need to keep this
in mind.
The following table summarizes the action of Boolean operators
in bit
manipulation.
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