how can I work this code?

Question

https://onlinegdb.com/qsDDO_VVp

Answer 1

cout << "the number is: " << j << endl;

Answer 2

#include <iostream>

using namespace std;

int main()
{
    cout<<"we will print numbers from 1 to 20 using for loop"<<endl;

    for(int j=1;j<=20;j++)
{
        cout<<"the number is:"<<j<<endl;
}   

    return 0;
}

Answer 3

/******************************************************************************

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*******************************************************************************/
#include <iostream>

using namespace std;

int main()
{
    cout<<"we will print numbers from 1 to 20 using for loop"<<endl;

    for(int j=1;j<=20;j++)
{
        cout<<"the number is:"<<j<<endl;
}   

    return 0;
}

Answer 4

cout<<"the number is:"<<j<<endl;