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IMSL Name:  IIDEX (Single precision version)
 
Revised:    June 10, 1991
 
Purpose:    Determine the position in a string at which a given
            character sequence begins without regard to case.
 
Usage:      IIDEX(CHRSTR, KEY)
 
Arguments:
   CHRSTR - Character string to be searched.  (Input)
   KEY    - Character string that contains the key sequence.
            (Input)
   IIDEX  - Position in CHRSTR where KEY begins.  (Output)
            If KEY occurs more than once in CHRSTR, the starting
            position of the first occurrence is returned.  If KEY
            does not occur in CHRSTR, then IIDEX returns a zero.
 
Remark:
   If the length of KEY is greater than the length CHRSTR, IIDEX
   returns a zero.
 
Keywords:   Utilities; Character string manipulation
 
GAMS:       N5c; N3
 
Chapters:   MATH/LIBRARY Utilities
            STAT/LIBRARY Utilities
 
Page No.:   MATH/LIBRARY User's Manual page 1302
            STAT/LIBRARY User's Manual page 1423