I am a beginner in Java programming, and I created a calculator as my first Java project. Therefore, can you review my code and provide feedbacks/ tips?import java.util.Scanner;public class Calculator {    public static void main(String[] args) {        double firstnum, secondnum, answer1, answer2, answer3, answer4, answer5, answer6;         String text;        int loop = 0;        Scanner input = new Scanner (System.in);        while (loop == 0) {        System.out.println(Enter your first number: );          firstnum = input. nextDouble();        System.out.println(Please enter the operation you would like to execute: );        text = input.next();         System.out.println(Enter your second number: );        secondnum = input.nextDouble();         answer1= firstnum+secondnum;        answer2= firstnum-secondnum;        answer3= firstnum*secondnum;        answer4= firstnum/secondnum;        answer5= (100*(firstnum/secondnum));        answer6= Math.pow(firstnum,secondnum);        switch (text) {        case + :            System.out.println(answer1);            break;         case - :              System.out.println(answer2);            break;         case * :             System.out.println(answer3);            break;         case x :             System.out.println(answer3);            break;         case / :              System.out.println(answer4);            break;         case % :              System.out.println(answer5);            break;         case ^ :              System.out.println(answer6);            break;         default :             System.out.println(Your operation was not recongized.);            }        }    }}
Beginners Java calculator
java;beginner;calculator