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cse160-staff@cs.washington.edu cse160_18sp_checkin01 > array_count9
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Given an array of ints, return the number of 9's in the array.


array_count9([1, 2, 9]) → 1
array_count9([1, 9, 9]) → 2
array_count9([1, 9, 9, 3, 9]) → 3

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def array_count9(nums):

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Difficulty: 218.0

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