Procedure

     NOTRU ( No true entries? )

     LOGICAL FUNCTION NOTRU ( LOGCLS, N )

Abstract

     Determine if none the entries in an array of logicals are .TRUE.

Required_Reading

     None.

Keywords

     UTILITY

Declarations

     IMPLICIT NONE

     LOGICAL               LOGCLS ( * )
     INTEGER               N

Brief_I/O

     VARIABLE  I/O  DESCRIPTION
     --------  ---  --------------------------------------------------
     LOGCLS     I   An array of logicals.
     N          I   Number of elements in the array LOGCLS.

     The function returns .TRUE. if no entry has a value of .TRUE.

Detailed_Input

     LOGCLS   is an array of logicals.

     N        is the number of elements in the array LOGCLS

Detailed_Output

     The function returns true if no entry of LOGCLS is .TRUE.

Parameters

     None.

Exceptions

     Error free.

     1)  If N is less than 1, the function returns a value of .TRUE.

Files

     None.

Particulars

     This function examines each element of LOGCLS until
     a .TRUE. value is found or until all values have been
     examined.

Examples

     Suppose you needed to confirm that no entry of a character set
     WORDS was one of the words in the phrase

       'EVERY GOOD BOY DOES FINE'

     You might execute the following block of code.

           FOUND(1) = ELEMC  ( 'EVERY', WORDS )
           FOUND(2) = ELEMC  ( 'GOOD',  WORDS )
           FOUND(3) = ELEMC  ( 'BOY',   WORDS )
           FOUND(4) = ELEMC  ( 'DOES',  WORDS )
           FOUND(5) = ELEMC  ( 'FINE',  WORDS )

           OK       = NOTRU  ( FOUND,   5     )

Restrictions

     None.

Literature_References

     None.

Author_and_Institution

     J. Diaz del Rio    (ODC Space)
     W.L. Taber         (JPL)

Version

    SPICELIB Version 1.1.0, 12-AUG-2021 (JDR)

        Added IMPLICIT NONE statement.

        Edited the header to comply with NAIF standard.

    SPICELIB Version 1.0.1, 10-MAR-1992 (WLT)

        Comment section for permuted index source lines was added
        following the header.

    SPICELIB Version 1.0.0, 12-JUL-1991 (WLT)