HP MLIB User's Guide Vol. 2 7th Ed.

606 HP MLIB User’s Guide
LSAME return .TRUE
Name LSAME
return .TRUE
Purpose LSAME returns .TRUE if CA is the same letter as CB regardless of case.
Usage CHARACTER*1 CA, CB
CALL LSAME(CA, CB)
Input CA, CB
CA and CB specify the single characters to be
compared.