Question

Write a program to input the radius of a circle and find its area and circumference. Note:
Area of a circle=22/7 * radius^2
Circumference of a circle= 2 * 22/7 * radius

Class 9 - Computer Applications - Ch 5 - Input in JAVA

Answer 1

Hey there!

Program to input the radius of a circle and find its area and circumference.

import java.util.*;  

public class Question7  

{     static void main()    

 {          

Scanner sc=new Scanner(System.in);      

 float radius,area,circumference;          

System.out.println("Enter radius of a circle:");  

       radius=sc.nextFloat();          

area=(float)22/7*radius*radius;        

circumference=2*(float)22/7*radius;        

 System.out.println("Area="+area);        

 System.out.println("Circumference="+circumference);    

 }  

}

Hope It Helps You!

Answer 2

hey mate here is ur answer..

import java. util. *;
class circle
{
public static void main ()
{
int r, a, c;
System. out.println( "enter a radius");
r=sc.nextInt();
{
$a = 22 \div 7 \times {r}^{2}$
;
$c = 2 \times 22 \div 7 \times r$
;
}
System.out.println("area of circle ");
}
System. out. println( "circumference of circle ");
}
.
.
.
hope this helps you...