8.223 SIGN — Sign copying function

Description:

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

Standard:

Fortran 77 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
SIGN(A,B)	REAL(4) A, B	REAL(4)	f77, gnu
ISIGN(A,B)	INTEGER(4) A, B	INTEGER(4)	f77, gnu
DSIGN(A,B)	REAL(8) A, B	REAL(8)	f77, gnu