Open Watcom FORTRAN 77 Language Reference

8 Assignment Statements
8.1 Introduction
Assignment statements are used to define entities. There are four different types of assignment.
1. Arithmetic
2. Logical
3. Statement label (ASSIGN)
4. Character
8.2 Arithmetic Assignment
The form of an arithmetic assignment statement is
v = e
where:
v
e
is a variable name or array element name of type INTEGER, REAL, DOUBLE PRECISION,
COMPLEX or double precision complex (COMPLEX*16).
is an arithmetic expression.
The following are examples of arithmetic assignment statements.
Y = X**2 + 4.0*X + 3.0
Z(10) = 4.3*(X+Y)
Executing an arithmetic assignment statement causes the evaluation of the arithmetic expression e,
converting the type of the expression e to the type of v, and defining v with the result.
If v is of type INTEGER*1 or INTEGER*2, then the value of the expression e is first converted to type
INTEGER. The resulting integer is then assigned to v in the following way.
1. If v is of type INTEGER*2 and the value of e is such that −32768