# std::basic_ostream<CharT,Traits>::tellp

From cppreference.com
< cpp‎ | io‎ | basic ostream

pos_type tellp(); |  |

Returns the output position indicator of the current associated `streambuf` object.

Behaves as UnformattedOutputFunction (except without actually performing output). After constructing and checking the sentry object, | (since C++11)

If fail()==true, returns pos_type(-1). Otherwise, returns rdbuf()->pubseekoff(0, std::ios_base::cur, std::ios_base::out ).

### Parameters

(none)

### Return value

current output position indicator on success, pos_type(-1) if a failure occurs.

### Example

Run this code

    #include <iostream>
    #include <sstream>
    int main()
    {
        std::ostringstream s;
        std::cout << s.tellp() << '\n';
        s << 'h';
        std::cout << s.tellp() << '\n';
        s << "ello, world ";
        std::cout << s.tellp() << '\n';
        s << 3.14 << '\n';
        std::cout << s.tellp() << '\n' << s.str();
    }

Output:

    0
    1
    13
    18
    hello, world 3.14

### See also

seekp | sets the output position indicator (public member function)
tellg | returns the input position indicator (public member function of `std::basic_istream<CharT,Traits>`)
seekg | sets the input position indicator (public member function of `std::basic_istream<CharT,Traits>`)

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