Program to find the circumference of circle using function in java.

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 import java.util.*;

public class function {

    public static double calculateCircumference(int r){

        return(2*3.14*r);

    }

    public static void main(String[] args) {

        Scanner sc=new Scanner(System.in);

        System.out.println("enter the radius of circle=");

        int r=sc.nextInt();

        System.out.print("the circumference of circle is="+calculateCircumference(r));

    }

}

■》Output->

enter the radius of circle= 4

the circumference of circle is= 25.12

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