Abs(A)
Abs: INTEGER or REAL function.
The exact type depends on that of argument A---if A is
COMPLEX, this function's type is REAL
with the same `KIND=' value as the type of A.
Otherwise, this function's type is the same as that of A.
A: INTEGER, REAL, or COMPLEX; scalar; INTENT(IN).
Intrinsic groups: (standard FORTRAN 77).
Description:
Returns the absolute value of A.
If A is type COMPLEX, the absolute
value is computed as:
SQRT(REALPART(A)**2, IMAGPART(A)**2)
Otherwise, it is computed by negating the A if it is negative, or returning A.
See section Sign Intrinsic, for how to explicitly compute the positive or negative form of the absolute value of an expression.
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