Answer 1

public class Program
{
public static void main(String[] args) {
System.out.println("\u20B9");
}
}

If you're tyring it on Sololearn, above code wont get your output as sololearn uses html entities to output unicodes. For sololearn purpuse there is a hack, we can print directly the html entity '& #x20b9;'

public class Program
{
public static void main(String[] args) {
System.out.println("& #x20b9;");
}
}
//IMPORTANT try copy pasting above code without space between & and #. This was made in purpose because if not, sololearn will convert that into my unicode indian ruppee