What is the output of this program?#include using namespace

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What is the output of this program?

#include 
    using namespace std;
    int main()
    {
        int k;
        for (k = 0; k < 20; k++);
        {
            cout << k;
        }
        return 0;
    }

1. 0
2. 20
3. Compilation Error
4. Runtime Error
5. None of these

Correct Option: B

for loop with a semicolon is called as body less for loop. It is used only for incrementing the variable values. So in this program the value is incremented and printed as 20.