Routines (alphabetical) > Routines: H > HDF Routines > HDF_AN_ANNLEN

# HDF_AN_ANNLEN

This function returns the number of characters contained in the HDF AN annotation specified by the annotation identifier Annotation_id.

## Syntax

Result = HDF_AN_ANNLEN(Annotation_id)

## Return Value

The number of characters contained in the HDF AN annotation.

## Arguments

### Annotation_id

Annotation identifier returned by HDF_AN_CREATE, HDF_AN_CREATEF, or HDF_AN_SELECT.

## Keywords

None

## Version History

5.2 | Introduced