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Warmup-2 > arrayCount9
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Given an array of ints, return the number of 9's in the array.


arrayCount9([1, 2, 9]) → 1
arrayCount9([1, 9, 9]) → 2
arrayCount9([1, 9, 9, 3, 9]) → 3

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public int arrayCount9(int[] nums) { }

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