import java.util.*;
class Exercise4{
public static void main(String args[]){
Scanner sc=new Scanner(System.in);
System.out.println("Enter radius of circle");
double radius=sc.nextDouble();
double per,area;
per=2*Math.PI*radius;
area=Math.PI*radius*radius;
System.out.println("Perimeter of circle = "+per);
System.out.println("Radius of circle = "+per);
}
}
Save as: Exercise4.java
Output:
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