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The following function brings the non-zero elements of the array to the front, ...

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The following function brings the non-zero elements of the array to the front, sequentially. Explain how it does that. Also state what is being returned.

  1 int pruneArray1(float arr[], int n) {

  2         float newArr[n];

  3         int i, j;   

  4         for (i = 0, j = 0; i < n; ++i)

  5           if (arr[i] != 0.0)

  6                 newArr[j++] = arr[i];

  7         for (i = 0; i < j; ++i)

  8                 arr[i] = newArr[i];

  9         for (   ; j < n; ++j)

 10                 arr[j] = 0.0;

 11         return i;

 12   }

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