## VRdAdd

#### Routine

void VRdAdd (const double x1[], const double x2[], double y[], int N)

#### Purpose

Element-by-element sum of two double arrays

#### Description

This routine calculates the sum of corresponding elements of two double arrays,

      y[i] = x1[i] + x2[i],  0 <= i < N.

#### Parameters

-> const double x1[]
  Input array (N elements)
-> const double x2[]
  Input array (N elements)
<- double y[]
  Output array (N elements). The output array can be the same as either of the input arrays.
-> int N
  Number of elements in the arrays (may be zero)

#### Author / revision

P. Kabal / Revision 1.2 2003/05/09

#### See Also

VRdZero

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