I wanted to make a calculator that is capable to do code with 2,3 or 4 values.

e.g.1 + 2 * 3 -4 or 1 + 2 -3

This the code I made:

import java.util.*;

public class LoopCalc {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        System.out.println("How many values do you like (2, 3, or 4):");
        int values = scan.nextInt();

        double[] num = new double[values];

        for (int i = 0; i < num.length; i++) {
            System.out.println("Enter value " + (i + 1) + ":");
            double value = scan.nextDouble();
            num[i] = value;
              
        
        }
    }
}

I do not know what to do next and I do not want to use too much case and if/else statements.