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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.
operator-unary-left:
operator-unary-right:
operator-binary:
^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).
operator-ternary-left:
operator-ternary-right:
:The only ternary operator, formed by operator-ternary-left and operator-ternary-right, returns the value of its second argument if the first argument is non-zero; 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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