FORTRAN Reference Manual

Expressions

FORTRAN Reference Manual—528615-001

3-11

Operator Precedence

Each FORTRAN operator has a precedence relative to all other operators. When the

compiler evaluates an expression, it compares the precedence of two adjacent

operators. If one operator has higher precedence than the other, the operator with the

higher precedence is evaluated first. For further information on operator precedence

within an operator class, see the appropriate discussion in this section.

You can override the normal operator precedence by enclosing expressions in

parentheses.

Table 3-7 shows the precedence of all FORTRAN operators, where 0 is the highest

precedence, 9 is the lowest precedence.

.NEQV. .TRUE. .TRUE. .FALSE.

.TRUE. .FALSE. .TRUE.

.FALSE. .TRUE. .TRUE.

.FALSE. .FALSE. .FALSE.

Table 3-7. Operator Precedence (page1of2)

Operator Class Operator Precedence

Arithmetic **

unary +

unary -

Table 3-6. Evaluation of Logical Expressions (page 2 of 2)

Operator Operand Operand Result