CODEWITHSUNDEEP
java
Quoc Le
Quoc Le

Reputation: 1

How do I fix the tax rate operation?

The goal is to provide the total sale, however, the tax rate is not calculating correctly since it keeps outputting 0.0.

import java.util.Scanner; //Required for axquiring user's input

public class salesTax {

    public static void main(String[] args) {
        int retailPrice; //Holds the retail price
        int taxRate; //Holds sales tax rate
        double salesTax; //Holds sales tax
        double totalSale; //Holds total sale
        
        //Scanner object to acquire user's input
        Scanner input = new Scanner(System.in);
        
        //Acquire user's retail price
        System.out.println("What is the retail price of the item being purchased? ");
        retailPrice = input.nextInt();
        
        //Acquire user's sales tax rate
        System.out.println("What is the sales tax rate? ");
        taxRate = input.nextInt() / 100;
        
        //Display the sales tax for the purchase
        salesTax = retailPrice * taxRate; //Calculates the sales tax
        System.out.println("The sales tax for the purchase is: " + salesTax);
        
        //Display the total of the sale
        totalSale = retailPrice + salesTax; //Calculate the total sale
        System.out.println("The total of the sale is: " + totalSale);
    }
}

Is there a way to fix the tax rate to produce accurate calculations, given that the tax rate is inputted by the user?

Upvotes: 0

Views: 281

Answers (3)

Hasnain Ali
Hasnain Ali

Reputation: 462

Your tax rate needs to be a double since you're dividing it by 100 and then assigning it taxRate. Since tax rate is an int, it will truncate the value leaving only the integer value.

If taxRate = 7 and then you divide it by 100, you get 0.07. Since taxRate is an Integer value, when Java sees said 0.07 it will get rid of the decimal and only leave the whole number. Therefore, say taxRate = 3.9999, since taxRate is an int, it will truncate the value leaving 3. To fix this, change taxRate to a double.

Also, you need to read taxRate as a double value. To read a double value using Scanner, it will be taxRate = input.nextDouble() / 100;

Upvotes: 0

Ismail
Ismail

Reputation: 3042

To calculate the tax rate you are reading an integer from System input and you are dividing it by 100 which gives an integer result, I think you are entering values less than 100. You need to read the values from the scanner as a float.

try this instead:

float taxRate;
taxRate = input.nextFloat() / 100;

EDIT:

As mentioned in the comments the taxRate value is between 0 and 1, so you should declare the taxRate as float or double.

Upvotes: 1

Nick Juelich
Nick Juelich

Reputation: 436

taxRate = input.nextInt() / 100;

This will give you 0 because you are dividing by an integer. You can take the number in as a float and divide by 100

float taxRate;
taxRate = input.nextFloat() / 100;

Upvotes: 3

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