KIND(X) returns the kind value of the entity X. 
Fortran 95 and later
Inquiry function
K = KIND(X) 
| X | Shall be of type LOGICAL,INTEGER,REAL,COMPLEXorCHARACTER. It may be scalar or array valued. | 
The return value is a scalar of type INTEGER and of the default integer kind. 
program test_kind
  integer,parameter :: kc = kind(' ')
  integer,parameter :: kl = kind(.true.)
  print *, "The default character kind is ", kc
  print *, "The default logical kind is ", kl
end program test_kind
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    https://gcc.gnu.org/onlinedocs/gcc-10.2.0/gfortran/KIND.html