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9.3 ABS — Absolute value

Description:

ABS(A) computes the absolute value of A.

Standard:

Fortran 77 and later, has overloads that are GNU extensions

Class:

Elemental function

Syntax:

RESULT = ABS(A)

Arguments:
AThe type of the argument shall be an INTEGER, REAL, or COMPLEX.
Return value:

The return value is of the same type and kind as the argument except the return value is REAL for a COMPLEX argument.

Example:
program test_abs
  integer :: i = -1
  real :: x = -1.e0
  complex :: z = (-1.e0,0.e0)
  i = abs(i)
  x = abs(x)
  x = abs(z)
end program test_abs
Specific names:
NameArgumentReturn typeStandard
ABS(A)REAL(4) AREAL(4)Fortran 77 and later
CABS(A)COMPLEX(4) AREAL(4)Fortran 77 and later
DABS(A)REAL(8) AREAL(8)Fortran 77 and later
IABS(A)INTEGER(4) AINTEGER(4)Fortran 77 and later
BABS(A)INTEGER(1) AINTEGER(1)GNU extension
IIABS(A)INTEGER(2) AINTEGER(2)GNU extension
JIABS(A)INTEGER(4) AINTEGER(4)GNU extension
KIABS(A)INTEGER(8) AINTEGER(8)GNU extension
ZABS(A)COMPLEX(8) ACOMPLEX(8)GNU extension
CDABS(A)COMPLEX(8) ACOMPLEX(8)GNU extension