Open Watcom FORTRAN 77 Language Reference

Language Reference
8.3 Logical Assignment
The form of a logical assignment statement is
v = e
where:
v
e
is a variable name or array element name of type LOGICAL.
is a logical expression.
The following are examples of logical assignment statements.
LOG1 = .TRUE.
LOG2 = (X.GT.Y) .AND. (X.LT.Z)
LOG3(2) = LOG2 .EQV. LOG1
Executing a logical assignment statement causes the evaluation of the logical expression e, and defining v
with the result. Note that the type of v and e must be LOGICAL.
8.4 Statement Label Assignment
The form of a statement label assignment is
ASSIGN s to i
where:
s
i
is a statement label.
is the name of an integer variable.
The following is an example of a statement label assignment statement.
ASSIGN 10 TO I
The result of executing an ASSIGN statement causes the integer variable i to be defined with the value of
the statement label s. s must be the statement label of an executable statement or a format statement in
the same program unit in which the ASSIGN statement appears. It is possible to change the value of i by
executing another ASSIGN statement.
During execution when i is used in an assigned GO TO statement, an ASSIGN statement which defines i
must have been executed prior to the execution of the assigned GO TO statement.
188 Statement Label Assignment