### FITSVAL

Reports the value of a keyword in the FITS extension.

#### Description:

This application reports the value of a keyword in the FITS extension (‘airlock’) of an NDF  file. The keyword’s value and comment are also stored in output parameters.

#### Usage:

fitsval ndf keyword

#### Parameters:

The name of an existing keyword in the FITS extension whose value is to be reported. A name may be compound to handle hierarchical keywords, and it has the form keyword1.keyword2.keyword3 etc. The maximum number of keywords per FITS  card is 20. Each keyword must be no longer than 8 characters, and be a valid FITS keyword comprising only alphanumeric characters, hyphen, and underscore. Any lowercase letters are converted to uppercase and blanks are removed before comparison with the existing keywords.

KEYWORD may have an occurrence specified in brackets [] following the name. This enables the values to be obtained for keywords that appear more than once. Note that it is not normal to have multiple occurrences of a keyword in a FITS header, unless it is blank, COMMENT or HISTORY. Any text between the brackets other than a positive integer is interpreted as the first occurrence.

The suggested value is the current value.

The NDF containing the FITS keyword.

#### Results Parameters

##### COMMENT = LITERAL (Write)
The comment of the keyword.
##### VALUE = LITERAL (Write)
The value of the keyword.

#### Examples:

fitsval abc bscale
This reports the value of the FITS keyword BSCALE, which is located within the FITS extension of the NDF called abc.
fitsval ndf=abc keyword=date[2]
This reports the value of the second occurrence FITS keyword DATE, which is located within the FITS extension of the NDF called abc.

#### Related Applications

KAPPA: FITSEDIT, FITSEXIST, FITSHEAD, FITSLIST, FITSMOD.