compute area of the circle.

java

Code:

//compute area of the circle.
class area{
public static void main(String[] args)
{
double pi,a;
pi=3.1415;
for(int r=1;r<5;r++)
{
a=pi*r*r;
}
System.out.println("Area of the circle is"+a);
}
}

cmd shows an error saying "a" needs to be initialized.. how can i do that when "a" is the result??

DrRakha

Code:

double pi,a;

to

Code:

double pi=0.0d,a=0.0d;

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compute area of the circle.