public class MainClass {
public static void main(String[] arg) {
for (double radius = 1.0; radius <= 2.0; radius += 0.2) {
System.out.println("radius = " + radius + "area = " + Math.PI * radius * radius);
}
}
}
radius = 1.0area = 3.141592653589793
radius = 1.2area = 4.523893421169302
radius = 1.4area = 6.157521601035994
radius = 1.5999999999999999area = 8.04247719318987
radius = 1.7999999999999998area = 10.178760197630927
radius = 1.9999999999999998area = 12.566370614359169