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std::unordered_map::find

iterator find( const Key& key );
 (1) 
const_iterator find( const Key& key ) const;
 (2)
1,2) Finds an element with key equivalent to key.

Parameters

key - key value of the element to search for

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.

Complexity

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

Example

#include <iostream>
#include <unordered_map>
 
int main()
{  
    std::unordered_map<int,char> example = {{1,'a'},{2,'b'}};
 
    auto search = example.find(2);
    if (search != example.end()) {
        std::cout << "Found " << search->first << " " << search->second << '\n';
    } else {
        std::cout << "Not found\n";
    }
}

Output:

Found 2 b

See also

returns the number of elements matching specific key
(public member function)
returns range of elements matching a specific key
(public member function)

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