7.158 MOD — Remainder function

Description:

MOD(A,P) computes the remainder of the division of A by P. It is calculated as A - (INT(A/P) * P).

Standard:

Fortran 77 and later

Class:

Elemental function

Syntax:

RESULT = MOD(A, P)

Arguments:

A	Shall be a scalar of type INTEGER or REAL
P	Shall be a scalar of the same type as A and not equal to zero

Return value:

The kind of the return value is the result of cross-promoting the kinds of the arguments.

Example:

          program test_mod
            print *, mod(17,3)
            print *, mod(17.5,5.5)
            print *, mod(17.5d0,5.5)
            print *, mod(17.5,5.5d0)
          
            print *, mod(-17,3)
            print *, mod(-17.5,5.5)
            print *, mod(-17.5d0,5.5)
            print *, mod(-17.5,5.5d0)
          
            print *, mod(17,-3)
            print *, mod(17.5,-5.5)
            print *, mod(17.5d0,-5.5)
            print *, mod(17.5,-5.5d0)
          end program test_mod
     

Specific names:

Name	Arguments	Return type	Standard
AMOD(A,P)	REAL(4)	REAL(4)	Fortran 95 and later
DMOD(A,P)	REAL(8)	REAL(8)	Fortran 95 and later