Tektronix Keithley 2601B-PULSE Reference Manual

Section 10: Instrument programming Model 2601B-PULSE System SourceMeter Instrument Reference Manual
10-26 2601B-PULSE-901-01A April 2020
Example: Break with infinite loop
a, b = 0, 1
while true do
print(a, b)
a, b = b, a + b
if a > 500 then
break
end
end
This example uses a break statement that
causes the while loop to exit if the value of a
becomes greater than 500.
Output:
0 1
1 1
1 2
2 3
3 5
5 8
8 13
13 21
21 34
34 55
55 89
89 144
144 233
233 377
377 610
Tables and arrays
Lua makes extensive use of the data type table, which is a flexible array-like data type. Table indices
start with 1. Tables can be indexed not only with numbers, but with any value except nil. Tables can
be heterogeneous, which means that they can contain values of all types except nil.
Tables are the sole data structuring mechanism in Lua. They may be used to represent ordinary
arrays, symbol tables, sets, records, graphs, trees, and so on. To represent records, Lua uses the
field name as an index. The language supports this representation by providing a.name as an easier
way to express a["name"].
The output you get from this example may vary depending on the data format settings of the
instrument.
Example: Loop array
atable = {1, 2, 3, 4}
i = 1
while atable[i] do
print(atable[i])
i = i + 1
end
Defines a table with four numeric elements.
Loops through the array and prints each element.
The Boolean value of atable[index] evaluates to
true if there is an element at that index. If there is
no element at that index, nil is returned (nil is
considered to be false).
Output:
1
2
3
4

Tektronix Keithley 2601B-PULSE Specifications

General

Brand	Tektronix
Model	Keithley 2601B-PULSE
Category	Measuring Instruments
Language	English