Creating an array with a while loop

I want to create an array using a while loop but I don't know how to do it.  I basically want to do the same thing as in the picture of the example VI found in LabVIEW's example VIs called "XY graph data types.vi," but with a while loops instead of a for loop.  The reason I want to do this with a while loop is because LabVIEW won't allow me to pass error out or VISA out data wires through a for loop.