Local variable may have not been initialized in switch case-CodePudding

I've initialized the variable I wanted, but after adding it's values through a switch case, I cannot return it. Is there any solutions?`


import java.util.*;

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

        System.out.print("Masukkan nilai a = ");
        int a = input.nextInt();

        System.out.print("Masukkan nilai b = ");
        int b = input.nextInt();

        System.out.print("Mau diapain bang angkanya? ");
        String o = input.next();

        int hasil;
        switch (o) {
        case " ":
            hasil = a   b;
            break;
        case "-":
            hasil = a - b;
            break;
        case "*":
            hasil = a * b;
            break;
        case "/":
            hasil = a / b;
            break;
        default:
            System.out.println("Operator tidak valid");
        }

// Error is here, stating that I haven't initialized the variable
        System.out.println(hasil);

    }
}

I've tried putting the console out in each of the case, and it did worked. So, is my first way of doing it is not working?

CodePudding user response：

init your int hasil = 0; or assign a value for it in the default case

default:
  hasil = 0;
  System.out.println("Operator tidak valid");

CodePudding user response：

It shows that error because you declared them but didn't initialized them.

Your variable should be initialized as int hasil = 0;

Check this reference for a better idea. This user has explained it very smoothly.