SIGN — Sign copying function

Description

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

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

Standard

Fortran 77 and later

Class

Elemental function