std::vector::pop_back(3)

🎀 std::vector::pop_back(3) 🎀

okay so welcome to the C++ Standard Libary manual page, bestie — this is the page for std::vector::pop_back.

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💖 NAME 💖

std::vector::pop_back — std::vector::pop_back

🦋 Synopsis 🦋

void pop_back();  (constexpr since C++20)

Removes the last element of the container. <span>✨</span>

⚠️ Calling pop_back on an empty container results in undefined behavior. no cap, do not do that, bestie 😭

Iterators (including the end() iterator) and references to the last element are invalidated.

🌸 Parameters 🌸

(none) — literally none, she takes no arguments 💅

🎀 Return value 🎀

(none) — nothing comes back out, she just does the thing 🫶

⭐ Complexity ⭐

Constant.

💜 Exceptions 💜

Throws nothing.

🧚 Example 🧚

// Run this code

#include <vector>
#include <iostream>

template<typename T>
void print(T const& xs)
{
    std::cout << "[ ";
    for (auto const& x : xs)
        std::cout << x << ' ';
    std::cout << "]\n";
}

int main()
{
    std::vector<int> numbers;

    print(numbers);

    numbers.push_back(5);
    numbers.push_back(3);
    numbers.push_back(4);

    print(numbers);

    numbers.pop_back();

    print(numbers);
}

🌈 Output 🌈

[ ]
[ 5 3 4 ]
[ 5 3 ]

👀 See also 👀

• push_back — adds an element to the end (public member function)

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mwah 💋 — source: http://cppreference.com, version/date: 2024.06.10, page: std::vector::pop_back(3) ✨