CODEWITHSUNDEEP
javaswitch-statement
Matthew Clifford
Matthew Clifford

Reputation: 1

Switch statement error in Java?

I'm very new to Java (Just started this afternoon), and I've been trying to build a simple conditional calculator using switch statements.

The code I'm trying to make is quite simple. At first, ask for user's input (Statement), then the first number, and the second number.

The correct calculations will be made in accordance to the value of the input (If it's 'Sum', then it'll be first number + second number. 'Sub' then first number - second number,...).

import java.util.Scanner;

class Scalc{
    public static void main(String[] args){

        Scanner input = new Scanner(System.in);

        //Variables//
        double fnum, snum, anum; //(First Number, Second Number, Answer Number)//
        String statement;

        //Input//

        System.out.println("Enter Statement: ");
        statement = input.nextLine();

        System.out.println("Enter First Number: ");
        fnum = input.nextDouble();

        System.out.println("Enter Second Number: ");
        snum = input.nextDouble();

        //Decision//

        switch (statement){

        case "Sum":
            anum = fnum + snum;
            System.out.println(anum);
            break;

        case "Sub":
            anum = fnum - snum;
            System.out.println(anum);
            break;

        case "Mul":
            anum = fnum * snum;
            System.out.println(anum);

        case "Div":
            anum = fnum / snum;
            System.out.println(anum);
            break;

        default:
            System.out.println("STATEMENT UNDEFINED");
            break;

        }
    }
}

Right now, though, it's stuck at 'Sub', for subtraction.

The programme runs normally, but when I input 'Mul', instead of multiplying the number, it subtracts instead. Same goes for 'Div'. Technically, the code seems to be stuck at subtraction and can't get any farther than that.

I'm still a noob at this so ...

Anyone?

Upvotes: 0

Views: 72

Answers (1)

Pavneet_Singh
Pavneet_Singh

Reputation: 37404

You need to add break in under Mul case otherwise your next case statements will keep on executing until end of switch or break 

 case "Mul":
    anum = fnum * snum;
    System.out.println(anum);
 break;

Upvotes: 4

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