19 March 2018 9:21:08.214 AM CHAR_ALLOC: FORTRAN90 version. Investigate some options for declaration of CHARACTER variables. Note that FORTRAN2003 allows the declaration of character variables with an allocatable LEN but for earlier FORTRAN's, this is NOT allowed! TEST01 Test the use of explicit LEN but unknown dimension: CHARACTER ( LEN = 1 ), ALLOCATABLE, DIMENSION ( : ) ::CH_VEC We allocate 52 entries in the string. Here is the string after use: "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz" TEST02 Test the use of explicit LEN but unknown dimension: CHARACTER ( LEN = 2 ), ALLOCATABLE, DIMENSION ( : ) ::CH_VEC We allocate 26 entries in the string. Here is the string after use: "AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz" TEST03 Test the use of unknown LEN: CHARACTER ( LEN = : ), ALLOCATABLE :: STRING String = "hot" Length of string is 3 String = "Rama-rama-ding-dong!" Length of string is 20 CHAR_ALLOC: Normal end of execution. 19 March 2018 9:21:08.214 AM