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Section 6: Instrument programming Model 2657A High Power System SourceMeter® Instrument Reference Manual

6-18 2657A-901-01 Rev. B/December 2012

Example

print(10 or errorqueue.next())

print(nil or "a")

print(nil and 10)

print(false and errorqueue.next())

print(false and nil)

print(false or nil)

print(10 and 20)

1.00000e+01

nil

false

nil

2.00000e+01

String concatenation

String operators

Operator Description

Concatenates two strings. If either argument is not a string, it is coerced to a string

(in a reasonable format) before concatenation.

Example: Concatenation

print(2 .. 3)

print("Hello " .. "World")

Hello World

Operator precedence

Operator precedence in Lua follows the order below (from higher to lower priority):

• ^ (exponentiation)

• not, - (unary)

• *, /

• +, −

• .. (concatenation)

• <, >, <=, >=, ~=, ==

• and

• or

Keithley 2657A User Manual

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