NAME¶

std::basic_string::push_back - std::basic_string::push_back

Synopsis¶

void push_back( CharT ch ); (until C++20)
constexpr void push_back( CharT ch ); (since C++20)

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

Parameters¶

ch - the character to append

Return value¶

(none)

Complexity¶

Amortized constant.

Exceptions¶

If an exception is thrown for any reason, this function has no effect (strong
exception guarantee).
(since C++11)

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

Example¶

// Run this code

#include <cassert>
#include <string>
#include <iomanip>
#include <iostream>

int main()
{
std::string str{"Short string"};
std::cout << "before=" << std::quoted(str) << '\n';
assert(str.size() == 12);

str.push_back('!');
std::cout << " after=" << quoted(str) << '\n';
assert(str.size() == 13);
}

Output:¶

before="Short string"
after="Short string!"

See also¶

pop_back removes the last character
(C++11) (public member function)