Intel® Fortran Compiler 17.0 Developer Guide and Reference
The amount of data storage, the size of arrays, and the total size of executable programs are limited only by the amount of process virtual address space available, as determined by system parameters.
The table below shows the limits to the size and complexity of a single Intel® Fortran program unit and to individual statements contained within it:
Language Element |
Limit |
|---|---|
Actual number of arguments per CALL or function reference |
Limited only by memory constraints |
Arguments in a function reference in a specification expression |
255 |
Array dimensions |
31 (The Fortran 2008 standard supports a maximum array dimension of 15.) |
Array elements per dimension |
2**31-1 on systems using IA-32 architecture 2**63-1 on systems using Intel® 64 architecture Limited by current memory configuration. |
Character lengths |
2**31-1 on systems using IA-32 architecture 2**63-1 on systems using Intel® 64 architecture |
Constants: character and Hollerith |
7198 |
Constants: characters read in list-directed I/O |
2048 characters |
Continuation lines |
No fixed limit; at least 255 lines of 132 or fewer characters. Longer lines may reduce the number of allowed continuations, subject to the limit on lexical tokens per statement. |
Data and I/O implied DO nesting |
31 |
DO, CASE, FORALL, WHERE, and block IF statement nesting (combined) |
512 |
DO loop index variable |
9,223,372,036,854,775,807= 2**63-1 |
Format group nesting |
8 |
Fortran source line length |
fixed form: 72 (or 132 if /extend_source is in effect) characters free form: 7200 characters |
INCLUDE file nesting |
20 levels |
Labels in computed or assigned GOTO list |
Limited only by memory constraints |
Lexical tokens per statement |
40000 |
Named common blocks |
Limited only by memory constraints |
Nesting of array constructor implied DOs |
31 |
Nesting of input/output implied DOs |
31 |
Nesting of interface blocks |
Limited only by memory constraints |
Nesting of DO, IF, or CASE constructs |
Limited only by memory constraints |
Nesting of parenthesized formats |
Limited only by memory constraints |
Number of arguments to MIN and MAX |
Limited only by memory constraints |
Number of digits in a numeric constant |
Limited by statement length |
Parentheses nesting in expressions |
Limited only by memory constraints |
Structure nesting |
30 |
Symbolic name length |
63 characters |
Width field for a numeric edit descriptor |
2**15-1 on systems using IA-32 architecture 2**31-1 on systems using Intel® 64 architecture For limits of other edit descriptor fields, see Forms for Data Edit Descriptors. |
See the product Release Notes for more information on memory limits for large data objects.