Conditional Constructs in Java

Chapter 9

Conditional Constructs in Java

Class 9 - Logix Kips ICSE Computer Applications with BlueJ

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Java Programs - Festival Discount Calculator

A cloth showroom has announced the following festival discounts on the purchase of items based on the total cost of the items purchased:

Total Cost	Discount Rate
Less than Rs. 2000	5%
Rs. 2000 to less than Rs. 5000	25%
Rs. 5000 to less than Rs. 10,000	35%
Rs. 10,000 and above	50%

Write a program to input the total cost and to compute and display the amount to be paid by the customer availing the the discount.

Java

import java.util.Scanner;
 
public class FestivalDiscount {
    public static void main(String[] args) {
 
        Scanner sc = new Scanner(System.in);
 
        System.out.print("Enter total cost of items (Rs.): ");
        double totalCost = sc.nextDouble();
 
        double discountRate;
 
        if (totalCost < 2000) {
            discountRate = 0.05;
        } else if (totalCost < 5000) {
            discountRate = 0.25;
        } else if (totalCost < 10000) {
            discountRate = 0.35;
        } else {
            discountRate = 0.50;
        }
 
        double discountAmount = totalCost * discountRate;
        double amountToPay = totalCost - discountAmount;
 
        System.out.println("\n--- Bill Details ---");
        System.out.println("Total Cost      : Rs. " + totalCost);
        System.out.println("Discount Amount : Rs. " + discountAmount);
        System.out.println("Amount to Pay   : Rs. " + amountToPay);
 
        sc.close();
    }
}

Output

Output 1 : 
SAMPLE INPUT : 
Enter total cost of items (Rs.): 1800

SAMPLE OUTPUT : 
--- Bill Details ---
Total Cost      : Rs. 1800.0
Discount Amount : Rs. 90.0
Amount to Pay   : Rs. 1710.0

Output 2 : 
SAMPLE INPUT : 
Enter total cost of items (Rs.): 4200

SAMPLE OUTPUT : 
--- Bill Details ---
Total Cost      : Rs. 4200.0
Discount Amount : Rs. 1050.0
Amount to Pay   : Rs. 3150.0

Output 3 : 
SAMPLE INPUT : 
Enter total cost of items (Rs.): 12000

SAMPLE OUTPUT : 
--- Bill Details ---
Total Cost      : Rs. 12000.0
Discount Amount : Rs. 6000.0
Amount to Pay   : Rs. 6000.0

Explanation

1. Input

Accepts the total cost of items purchased.

2. Determine Discount Rate

Uses an if–else ladder to select the correct discount percentage based on the total cost.

3. Discount Calculation

Discount = Total Cost × Discount Rate

4. Final Amount

Amount to Pay = Total Cost − Discount