len Description Returns an int type specifying number of elements in the collection. Syntax len (collection) collection Required. Must be of sequence type. Return Value #TODO Time Complexity #TODO Example >>> len('foo') 3 >>> len([1, 2]) 2 >>> len((1, 2)) 2 >>> len({'a': 1, 'b': 2}) 2 >>> len({1, 2}) 2 See Also #TODO