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Erica Granville3,622 Points
how to add an array
how to add an array to another array
Steven Parker225,770 Points
That's not quite it. A string containing a comma is still just one string to the system (and not an array). Also, while altering the initialization might work, I think it's more literally in line with the challenge instructions to add something to the array (on another line) instead.
Hint: a convenient way to add something to an existing array is by using the "