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Question #222 Difficulty: 2

According to the C++17 standard, what is the output of this program? 

    #include <variant>
#include <iostream>
 
using namespace std;

int main() {
   variant<int, double, char> v;
   cout << v.index();
}

Hint:

index() returns the index of the type of the contained value.

Answer:

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