std::basic_string<CharT,Traits,Allocator>::push_back

void push_back( CharT ch );

constexpr void push_back( CharT ch );

Appends the given character ch to the end of the string.

Parameters

Return value

(none).

Complexity

Amortized constant.

Exceptions

If the operation would result in size() > max_size(), throws std::length_error.

If an exception is thrown for any reason, this function has no effect (strong exception safety guarantee).

Example

#include <iomanip>
#include <iostream>
#include <string>
 
int main()
{
    std::string str{"Short string"};
    std::cout << "1) " << std::quoted(str) << ", size: " << str.size() << '\n';
 
    str.push_back('!');
    std::cout << "2) " << std::quoted(str) << ", size: " << str.size() << '\n';
}

1) "Short string", size: 12
2) "Short string!", size: 13

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

See also