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dznrm2 examples
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Man Page Details
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NAME
       DZNRM2 - BLAS level one, computes the Euclidean norm of a vector

SYNOPSIS
       DOUBLE PRECISION FUNCTION DZNRM2 ( n, x, incx )

           INTEGER                        n, incx

           DOUBLE COMPLEX                 x


DESCRIPTION
       DZNRM2  computes  the Euclidean (L2) norm of a double precision complex
       vector:

               DZNRM2 <-- ||x||
                               2

       where x is a double precision complex vector.


ARGUMENTS
       n       INTEGER (input)
               Number of elements in the operand vector.

       x       DOUBLE COMPLEX (input)
               Array of dimension (n-1) * |incx| + 1.
               Array x contains the operand vector.

       incx    INTEGER (input)
               Increment between elements of x.
               If incx = 0, the results will be unpredictable.

RETURN VALUES
       DZNRM2  DOUBLE PRECISION Result (Euclidean norm). (output)
               If n <= 0, DZNRM2 is set to 0d0.

NOTES
       When  working backward (incx < 0), DZNRM2 starts at the end of the vec-
       tor and moves backward, as follows:

               x(1-incx * (n-1)), x(1-incx * (n-2)), ..., x(1)

