CODEWITHSUNDEEP
javainitialization
Kaiju
Kaiju

Reputation: 77

Error for variable to be initialized but it already is?

I'm having trouble with my Java code. It's not finished yet but I have an error telling me that the variable disRate has not been initialized but its has been in the else if statements.

This is an extra credit program for an Intro to Java class; it's an algorithm to calculate the final price for a discounted item based on the user's input of quantity and price.

import java.util.Scanner;


public class DiscountDemo {

    public static void main(String[] args) {
        // start code here

        //variables
        int quantity;
        double itemPrice, totalCost, disRate, disCost, netAmount;

        Scanner get = new Scanner(System.in);

        //user prompt
        System.out.print("Enter the quantity of an item: --> ");
        quantity = get.nextInt();

        System.out.print("Enter the price of an item: --> ");
        itemPrice = get.nextInt();

        //decision statements
        if(quantity <= 0 || itemPrice <=0)
        {
            System.out.println("\nInvalid Data!\n");

        }
        else if(quantity <= 9)
        {
            disRate = 0;

        }//if quantity <=9 end
        else if(quantity >= 10 && quantity <= 19)
        {
            disRate = .1;

        }//if quantity >=10 || <= 19 end
        else if(quantity >= 20 && quantity <= 49)
        {
            disRate = .2;

        }//if quantity >=20 || <= 49 end
        else if(quantity >= 50 && quantity <=99)
        {
            disRate = .3;

        }//if quantity >=50 || <= 99 end
        else if(quantity >= 100)
        {
            disRate = .35;

        }//if quantity >=100 end

        //calculation
        totalCost = quantity * itemPrice;
        disCost = totalCost * disRate;
        netAmount = itemPrice - disCost;


    } //main end

} //class end

Upvotes: 0

Views: 53

Answers (2)

Edu Costa
Edu Costa

Reputation: 1460

The problem is that you initialize disRateonly within a IF statement and if all the boolean condition is false disRate will be never initialized and the math on disCost = totalCost * disRate; could be not be done.

The IDE detects this situation and asks you to initialize disRate with a value.

Just do double disRate = 0; at the start of your code or add a else statement to initialize disRate.

Upvotes: 4

sgtcortez
sgtcortez

Reputation: 427

You just declared it, not initialized. You do not have an else, just have if-elseif, of course that when the value is greater or equal to 100 will enter at the last if-else, but the compiler can not be so smarter.

    } else if(quantity >= 50 && quantity <=99){
        disRate = .3;

    }else  {
        disRate = .35;
    }

Upvotes: 0

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