Attributes are extra properties of variables which go beyond the basic type. A few examples may be found in the following code fragment:

 FUNCTION encode(pixels)
 IMPLICIT NONE 
 INTEGER, PARAMETER :: n=1000 
 INTEGER, DIMENSION(n,n) :: pixels,encode 
 REAL, DIMENSION(n) :: x,y 
 INTEGER :: call=0 
 ...
 call = call + 1 
 ...
 END

Note in particular the PARAMETER attribute that qualifies the INTEGER type declaration for n (taking the place of a separate F77 PARAMETER statement); the use of :: as a separator between the declaration and the variable list; and the data initialization within the INTEGER statement (equivalent to a DATA statement with an implicit SAVE). In Fortran 90, precision (REAL*8, e.g.) is a special type property called KIND, and it should be placed in parentheses after the type (REAL(8), e.g.).