std::basic_string::empty - cppreference.com

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# std::basic_string::empty

From cppreference.com
< cpp‎ | string‎ | basic string

bool empty() const; |  |

Checks if the string has no characters, i.e. whether begin() == end().

### [edit] Parameters

(none)

### [edit] Return value

true if the string is empty, false otherwise

### [edit] Exceptions

(none) | (until C++11)
`noexcept` specification: noexcept | (since C++11)

### [edit] Complexity

Constant.

### [edit] Example

Run this code

    #include <iostream>
    #include <string>

    int main()
    {
        std::string s;
        std::boolalpha(std::cout);
        std::cout << "s.empty():" << s.empty() << "\t s:'" << s << "'\n";

        s = "Exemplar";
        std::cout << "s.empty():" << s.empty() << "\t s:'" << s << "'\n";

        s = "";
        std::cout << "s.empty():" << s.empty() << "\t s:'" << s << "'\n";
    }

Output:

    s.empty():true	 s:''
    s.empty():false	 s:'Exemplar'
    s.empty():true	 s:''

### [edit] See also

sizelength | returns the number of characters (public member function) [edit]

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Category:

- unconditionally noexcept