std::bitset<N>::size

Returns the number of bits that the bitset holds.

# Declarations

std::size_t size() const;

(noexcept since C++11) (constexpr since C++11)

# Return value

number of bits that the bitset holds, i.e. the template parameter N.

# Example

#include <bitset>
#include <iostream>
 
int main()
{
    std::cout << std::bitset<0x400>().size() << '\n';
}

# See also

• count