Precedence of Operators in Formula Nodes and Expression Nodes

LabVIEW 2018 Help

Edition Date: March 2018
Part Number: 371361R-01
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The precedence of operators is as follows, from highest to lowest. Operators on the same line all have the same precedence.

** exponentiation
+, -, !, ~, ++, and –– unary plus, unary negation, logical not, bit complement, pre- and post-increment, pre- and post-decrement

++ and –– are not available in Expression Nodes.
*, /, % multiplication, division, modulus (remainder)
+ and addition and subtraction
>> and << arithmetic shift right and shift left
>, <, >=, and <= greater, less, greater or equal, and less or equal
!= and == inequality and equality
& bit and
^ bit exclusive or
| bit or
&& logical and
|| logical or
? : conditional evaluation
= op= assignment, shortcut operate and assign

op can be +, , *, /, >>, <<, &, ^, |, %, or **.

= op= is not available in Expression Nodes.

The assignment operator = is right associative (groups right to left), as is the exponentiation operator **. All other binary operators are left associative.

The numeric value of TRUE is 1, and FALSE is 0 for output. The logical value of 0 is FALSE, and any nonzero number is TRUE. The logical value of the conditional expression

<lexpr> ? <texpr>: <fexpr>

is <texpr> if the logical value of <lexpr> is TRUE and <fexpr> otherwise.

Note Note  You can use Formula Node most effectively if you are familiar with the C programming language. LabVIEW Help assumes you are familiar with C and does not contain any topics related to programming in C. Refer to The C Programming Language by Brian W. Kernighan and Dennis M. Ritchie or Teach Yourself C by Herbert Schildt for more information.


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