Operator precedence

The operator precedence rules are show in Table . The rules of Fortran 90 are used as far as possible; in this table the larger numbers denote higher precedence (tighter binding).

Table: Operator precedence rules

Precedence	Function/operator
2	start/end of expression
4	( )
6	,
8	.EQV. .NEQV.
10	.OR. ${\tt \vert}$
12	.AND. &
14	.NOT. #
16	.EQ. .GE. .GT. .LE. .LT. .NE. ${\tt == ~ >= ~ > ~ <= ~ < ~ /=}$
18	FROM TO
20	//
22	+ - (binary operators)
24	+ - (unary operators)
26	* /
28	**
30	all functions

Note that all operators except ** associate from left to right, but ** and functions associate from right to left.