What is the error showing? How to declare constant?

Question

class areaofradius
{
public static void main (String args[]){
Double ra;
Scanner ra=new Scanner (System.in);
ra=nextdouble();
constant pi=3.14;
Areaofradius=pi*ra*ra;
}

}

Answer 1

Umm.... it seems that your whole program is wrong...

class areaofradius
{
public static void main (String args[]){
double ra; // lowercase 'd'
Scanner sc = new Scanner(System.in); // ra is already declared
ra = nextDouble(); //uppercase 'D'
static final double pi=3.14; // This is how you declare a constant
double Areaofradius=pi*(ra*ra);
}

}