Intel Fortran Language Reference - NCI National Facility

2 Intel Fortran Language Reference
Table 2-1 shows other statements restricted from different types of scoping units.
Table 2-1
Statements Restricted in Scoping Units
Scoping Unit
Main program
Module 1
Block data program unit
Internal subprogram
Interface body
Restricted Statements
ENTRY and RETURN statements
ENTRY, FORMAT, OPTIONAL, and INTENT statements,
statement functions, and executable statements
CONTAINS, ENTRY, and FORMAT statements, interface
blocks, statement functions, and executable statements
CONTAINS and ENTRY statements
CONTAINS, DATA, ENTRY, SAVE, and FORMAT
statements, statement functions, and executable
statements
1. The scoping unit of a module does not include any module subprograms that the module contains.
See Also
“Scope” for details on scoping units
Names
Names identify entities within a Fortran program unit (such as variables, function results, common
blocks, named constants, procedures, program units, namelist groups, and dummy arguments). In
FORTRAN 77, names were called "symbolic names".
A name can contain letters, digits, underscores ( _ ), and the dollar sign ($) special character. The
first character must be a letter or a dollar sign.
In Fortran 95/90, a name can contain up to 31 characters. Intel® Fortran allows names up to 63
characters.
The length of a module name (in MODULE and USE statements) may be restricted by your file
system.
NOTE. Be careful when defining names that contain dollar signs. On Linux*
and Windows* systems, a dollar sign can be a symbol for command or symbol
substitution in various shell and utility commands.
In an executable program, the names of the following entities are global and must be unique in the
entire program:
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