# std::vector<bool,Allocator>::flip

From cppreference.com
< cpp‎ | container‎ | vector bool

Defined in header `<vector>` |  |
void flip(); |  | (until C++20)
constexpr void flip(); |  | (since C++20)

Toggles each bool in the vector (replaces with its opposite value).

### Parameters

(none)

### Return value

(none)

### Example

Run this code

    #include <iostream>
    #include <vector>

    void print(const std::vector<bool>& vb)
    {
        for (const bool b : vb)
            std::cout << b;
        std::cout << '\n';
    }

    int main()
    {
        std::vector<bool> v { 0, 1, 0, 1 };
        print(v);
        v.flip();
        print(v);
    }

Output:

    0101
    1010

### See also

operator[] | access specified element (public member function of `std::vector<T,Allocator>`)
flip | toggles the values of bits (public member function of `std::bitset<N>`)

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