Java程序查找圆的圆周
圆的周长是其半径与PI值的乘积的两倍。因此，要计算一个圆的周长
获取用户形成的圆的半径。
计算产品
打印最终结果。
示例
import java.util.Scanner;
public class CircumfrenceOfCircle {
public static void main(String args[]){
int radius;
double circumference;
Scanner sc = new Scanner(System.in);
System.out.println("Enter the radius of the circle ::");
radius = sc.nextInt();
circumference = Math.PI*2*radius;
System.out.println("Circumference of the circle is ::"+circumference);
}
}输出结果
Enter the radius of the circle:: 55 The circumference of the circle is::345.57519189487726