DNUM

DNUM

Returns the number of members in a directory

Category: Directory

Syntax
Details
Example
See Also

Syntax

nval=DNUM(directory-id);

nval

contains the number of members in the directory.

Type: Numeric

directory-id

is the identifier that was assigned when the directory was opened. If directory-id is invalid, the program halts.

Type: Numeric

Details

You can use DNUM to determine the largest member number that can be passed to DREAD.

Example

Open the directory MYDIR, determine the number of members, and close the directory:

   /* Assign the fileref MYDIR to the          */
   /* filename stored in the variable DIRNAME  */
   /* and open it.                             */
rc=filename('mydir',dirname);
dirid=dopen('mydir');
memcount=dnum(dirid);
rc=dclose(dirid);

See Also

DREAD

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