Write a function that takes in the radius as input and returns the circumference of a circle.
import java.util.*;
public class Solutions {
public static Double getCircumference(Double radius) {
return 2 * 3.14 * radius;
}
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
Double r = sc.nextDouble();
System.out.println(getCircumference(radius));
}
}
Find the maximum & minimum number in an array of integers.
[HINT : Read about Integer.MIN_VALUE & Integer.MAX_VALUE in Java]
Input an email from the user. You have to create a username from the email by deleting the part that comes after ‘@’. Display that username to the user.
Example :
email = “mejona@gmail.com” ; username = “mejona”
email = “helloWorld123@gmail.com”; username = “helloWorld123”