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4.3 Operators
Gmsh’s operators are similar to the corresponding operators in C and C++. Here is the list of the unary, binary and ternary operators currently implemented.
operatorunaryleft:
operatorunaryright:
operatorbinary:
^
Exponentiation.
*
Multiplication.
/
Division.
%
Modulo.
+
Addition.

Subtraction.
==
Equality.
!=
Inequality.
>
Greater.
>=
Greater or equality.
<
Less.
<=
Less or equality.
&&
Logical ‘and’.

Logical ‘or’. (Warning: the logical ‘or’ always implies the evaluation of both arguments. That is, unlike in C or C++, the second operand of

is evaluated even if the first one is true).
operatorternaryleft:
operatorternaryright:
:
The only ternary operator, formed by operatorternaryleft and operatorternaryright, returns the value of its second argument if the first argument is nonzero; otherwise it returns the value of its third argument.
The evaluation priorities are summarized below(5) (from stronger to
weaker, i.e., *
has a highest evaluation priority than +
).
Parentheses ()
may be used anywhere to change the order of
evaluation:

()
,[]
,.
,#

^

!
,++
,
,
(unary) 
*
,/
,%

+
,

<
,>
,<=
,>=

==
,!=

&&



?:

=
,+=
,=
,*=
,/=
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