Contoh Program Menghitung Luas dan Keliling Linkaran

berikut contoh program untuk menghitung luas dan keliling lingakaran menggunakan bahasa pemprograman java import java.util.*;

public class lingkaran
{
public static void main(String[]args)
{
Scanner baca = new Scanner(System.in);
int r;
final double pi =3.14;
double luas;
double keliling;
int diameter;
System.out.print("masukan jari-jari: ");
r = baca.nextInt();

keliling = 2*pi*r;
luas = pi*r*r;
diameter = 2*r;

System.out.println("diameter lingkaran: "+diameter);
System.out.println("luas lingkaran: "+luas);
System.out.println("keliling lingkaran: "+keliling);
}
}

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