Return the Nth Even Number Example(Input --> Output) 1 --> 0 (the first even number is 0) 3 --> 4 (the 3rd even number is 4 (0, 2, 4)) 100 --> 198 1298734 --> 2597466 The input will not be 0.

def nth_even(n):
    return n * 2 - 2

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