L

 Lw (Logical Editing)

 On input, L transfers "w" characters from the external field and
 assigns a logical value to the corresponding I/O list element
 (which must be integer or logical data type).  If the first
 nonblank characters of the field are T, t, .T, or .t, the value
 .TRUE. is assigned to the corresponding I/O list element; if the
 first nonblank characters are F, f, .F, or .f, the value .FALSE. is
 assigned.  An all blank field is assigned the value .FALSE.  Any
 other value in the external field produces an error.  The logical
 constants .TRUE. and .FALSE. are acceptable input forms.

 On output, L transfers either the letter T (if the value of the
 corresponding I/O list element is .TRUE.) or the letter F (if the
 value is .FALSE.) to an external field that is "w" characters long.
 The letter T or F is in the rightmost position of the field,
 preceded by w-1 spaces.