In searching using Boolean operations will give you?

Answer 1

Searching with Boolean operations will only tell you if a value exists or does not exist in a data sequence. Ideally, when searching, you want to return some value that either refers to the value you are looking for or otherwise indicates that the value does not exist. Typically, we define a data sequence with begin and end iterators, where the end iterator is "one past the end" of the sequence, and return an iterator to the value, using the end iterator to denote the value was not found. When searching for multiple occurrences of a value, we typically return a collection of iterators, with an empty collection indicating no values were found.