Tektronix Keithley SourceMeter 2470, Справочное руководство

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2470 High Voltage SourceMeter Instrument Reference Manual Section 13: Introduction to TSP commands
2470-901-01 Rev. A /
May
2019 13-17
Bitwise operators
Operator Description
& AND
|
OR
^^ exclusive OR
<< bitwise shift left
>>
bitwise shift right
! logical NOT
Logical and bitwise operators
The logical operators in Lua are
and
,
or
, and
not
. All logical operators consider both
false
and
nil
as false and anything else as true.
The operator
not
always returns
false
or
true
.
The conjunction operator
and
returns its first argument if the first argument is
false
or
nil
;
otherwise,
and
returns its second argument. The disjunction operator
or
returns its first argument if
this value is different from
nil
and
false
; otherwise,
or
returns its second argument. Both
and
and
or
use shortcut evaluation, that is, the second operand is evaluated only if necessary.
The example output you get may vary depending on the data format settings of the instrument.
Example 1
print(10 or eventlog.next())
print(nil or "a")
print(nil and 10)
print(false and eventlog.next())
print(false and nil)
print(false or nil)
print(10 and 20)
Output:
10
a
nil
false
false
nil
20