numbers = [1,2,2,3,4,5,5,6,7,1,12,9,3] s = set() count = 0 for m in numbers: if numbers.count(m) > 1 : s.add(m) print(len(s)) Output: 4
Python programming examples – for beginners
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numbers = [1,2,2,3,4,5,5,6,7,1,12,9,3] s = set() count = 0 for m in numbers: if numbers.count(m) > 1 : s.add(m) print(len(s)) Output: 4