NAG Fortran Compiler, Release 7.2: Input/Output Information

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## 2.8 Input/Output Information

Item | Value
Standard error (stderr) unit number | 0
Standard input (stdin) unit number | 5
Standard output (stdout) unit number | 6
Default maximum record length for formatted output | 1024 characters
Default maximum record length for unformatted output | 2147483647 bytes

The default directory used for files opened with `STATUS='SCRATCH'` is ‘`/tmp`’ on Unix and the Windows temporary directory on Windows. This default may be overridden with the `TMPDIR` environment variable.