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# std::unordered_set::find

From cppreference.com
< cpp‎ | container‎ | unordered set

[edit template]

iterator find( const Key& key ); | (1) |
const_iterator find( const Key& key ) const; | (2) |

1,2) Finds an element with key equivalent to `key`.

### [edit] Parameters

key | - | key value of the element to search for

### [edit] Return value

Iterator to an element with key equivalent to `key`. If no such element is found, past-the-end (see end()) iterator is returned.

### [edit] Complexity

Constant on average, worst case linear in the size of the container.

### [edit] Example

Run this code

    #include <iostream>
    #include <unordered_set>

    int main()
    {
        std::unordered_set<int> example = {1, 2, 3, 4};

        auto search = example.find(2);
        if(search != example.end()) {
            std::cout << "Found " << (*search) << '\n';
        }
        else {
            std::cout << "Not found\n";
        }
    }

Output:

    Found 2

### [edit] See also

count | returns the number of elements matching specific key (public member function) [edit]
equal_range | returns range of elements matching a specific key (public member function) [edit]

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