6.189 SIGN — Sign copying function

Description:

SIGN(A,B) returns the value of A with the sign of B.

Standard:

F77 and later

Class:

Elemental function

Syntax:

RESULT = SIGN(A, B)

Arguments:

A	Shall be of type INTEGER or REAL
B	Shall be of the same type and kind as A

Return value:

The kind of the return value is that of A and B. If B\ge 0 then the result is ABS(A), else it is -ABS(A).

Example:

          program test_sign
            print *, sign(-12,1)
            print *, sign(-12,0)
            print *, sign(-12,-1)
          
            print *, sign(-12.,1.)
            print *, sign(-12.,0.)
            print *, sign(-12.,-1.)
          end program test_sign
     

Specific names:

Name	Arguments	Return type	Standard
ISIGN(A,P)	INTEGER(4)	INTEGER(4)	f95, gnu
DSIGN(A,P)	REAL(8)	REAL(8)	f95, gnu