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Statements
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─────Statements─────────────────────────────────────────────────────────────
A FORTRAN statement consists of an initial line, optionally
followed by continuation lines. Statements are written in columns 7
through 72.
There are two basic types of statements in FORTRAN: executable and
nonexecutable. An executable statement causes an action to be
performed. Nonexecutable statements describe, classify, or specify
the format of program elements, such as entry points, data, or
program units.
This table categorizes the FORTRAN statements. Select any item in
the first column for more information.
Categories of FORTRAN Statements
Category Type Description
◄Assignment statements► Executable Assign a value to a variable
or an array element.
◄BLOCK DATA,► Nonexecutable Define the start of a program
◄ENTRY► unit and specify its formal
◄FUNCTION► arguments.
◄INTERFACE TO►
◄PROGRAM►
◄SUBROUTINE►
◄Control statements► Executable Control order of execution
of statements.
◄DATA statement► Nonexecutable Assigns initial values to
variables.
◄FORMAT statement► Nonexecutable Provides data-editing
information.
◄I/O statements► Executable Transfer data and manipulate
files and records.
◄Specification statements► Nonexecutable Define the attributes of
variables, arrays, and
subprograms.
◄Statement-function► Nonexecutable Define simple, locally used
◄statements► functions
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