C++ bitset size() Function

C++ bitset size() function is used to check the size of the bitset. It returns the number of bits in the bitset.

Syntax

Parameter

It does not take any parameter.

Return value

It returns the number of bits in the bitset.

Example 1

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
    bitset<8> b;
    bitset<6> b1;
   cout << "size of bitset b : " << b.size() <<'\n'; 
     cout << "size of bitset b1 : " << b1.size() <<'\n'; 
   return 0;
}

Output:

size of bitset b : 8
size of bitset b1 : 6

Example 2

#include <iostream>
#include <bitset>
using namespace std;
int main()
{
    bitset<8> b(string("01010110"));
    bitset<4> b1(string("0110"));
      int a = b.size();
      int c = b1.size();
   cout << "size of bitset b : " << a <<'\n'; 
     cout << "size of bitset b1 : " << c <<'\n'; 
   return 0;
}

Output:

size of bitset b : 8
size of bitset b1 : 4

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C++ Bitset Function