Use the HELP,/STRUCTURE command to determine the type, structure, and tag name of each field in a structure. In the example above, a structure was stored into variable A. The statement,
HELP, /STRUCTURE, A
prints the following information:
** Structure STAR, 4 tags, length=40: NAME STRING 'SIRIUS' RA FLOAT 30.0000 DEC FLOAT 40.0000 INTEN INT Array(12)
Using HELP with anonymous structures prints the structure's name as a unique number enclosed in angle brackets. Calling HELP with the STRUCTURE keyword and no parameters prints a list of all defined, named structure types and their tag names.