Hi Friend,

Try the following code:

import java.util.*;
class  CalculateCommission{
    public static void main(String[] args) 
    {
    double goapackage=30000;
    double mumpackage=50000;
    double goacomm=0;
    double mumcomm=0;
    Scanner input=new Scanner(System.in);
    System.out.println("1 Trip to Goa");
    System.out.println("2 Trip to Mumbai");
    System.out.println("3 Exit");
    System.out.println();
    boolean exit=false;
    do{
        System.out.print("Enter your choice: ");
        int choice=input.nextInt();

    switch(choice){
        case 1:
             goacomm=goapackage*0.15;
        System.out.println("Commission for Goa is: "+goacomm);
        break;
        case 2:
             mumcomm=mumpackage*0.25;
        System.out.println("Commission for Mumbai is: "+mumcomm);
        break;
        case 3:
            exit=true;
        }
    }
    while(!exit);
    }
}

Thanks