9.86 DIM — Positive difference

Description:

DIM(X,Y) returns the difference X-Y if the result is positive; otherwise returns zero.

Standard:

Fortran 77 and later

Class:

Elemental function

Syntax:

RESULT = DIM(X, Y)

Arguments:

X	The type shall be INTEGER or REAL
Y	The type shall be the same type and kind as X. (As a GNU extension, arguments of different kinds are permitted.)

Return value:

The return value is of type INTEGER or REAL. (As a GNU extension, kind is the largest kind of the actual arguments.)

Example:

program test_dim
    integer :: i
    real(8) :: x
    i = dim(4, 15)
    x = dim(4.345_8, 2.111_8)
    print *, i
    print *, x
end program test_dim

Specific names:

Name	Argument	Return type	Standard
DIM(X,Y)	REAL(4) X, Y	REAL(4)	Fortran 77 and later
IDIM(X,Y)	INTEGER(4) X, Y	INTEGER(4)	Fortran 77 and later
DDIM(X,Y)	REAL(8) X, Y	REAL(8)	Fortran 77 and later