Conditional Constructs in Java

Chapter 8

Conditional Constructs in Java

Class 10 - Logix Kips ICSE Computer Applications with BlueJ

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Java Program: Cloth Discount Calculator for Dealers and Retailers

37. A cloth manufacturing company offers discounts to the dealers and retailers. The discount is computed using the length of the cloth as per the following table:

Length of cloth	Dealer's Discount	Retailer's Discount
Up to 1000 meters	20%	15%
Above 1000 meters but less than 2000 meters	25%	20%
More than 2000 meters	35%	25%

Write a program in Java to input the length of the cloth and the total amount of purchase. The program should display a menu to accept type of customer — Dealer (D) or Retailer (R) and print the amount to be paid. Display a suitable error message for a wrong choice.

Java

import java.util.Scanner;
 
public class ClothDiscount {
    public static void main(String[] args) {
 
        // Title
        System.out.println("CLOTH DISCOUNT CALCULATOR");
        System.out.println("-------------------------");
 
        Scanner sc = new Scanner(System.in);
 
        double length, amount, discount = 0, payable;
        char type;
 
        System.out.print("Enter length of cloth (in meters): ");
        length = sc.nextDouble();
 
        System.out.print("Enter total purchase amount (Rs.): ");
        amount = sc.nextDouble();
 
        System.out.println("Enter Customer Type:");
        System.out.println("D - Dealer");
        System.out.println("R - Retailer");
        System.out.print("Your choice: ");
        type = sc.next().charAt(0);
 
        switch (type) {
            case 'D':
            case 'd':
                if (length <= 1000)
                    discount = amount * 0.20;
                else if (length < 2000)
                    discount = amount * 0.25;
                else
                    discount = amount * 0.35;
                break;
 
            case 'R':
            case 'r':
                if (length <= 1000)
                    discount = amount * 0.15;
                else if (length < 2000)
                    discount = amount * 0.20;
                else
                    discount = amount * 0.25;
                break;
 
            default:
                System.out.println("Invalid customer type!");
                sc.close();
                return;
        }
 
        payable = amount - discount;
 
        System.out.println("Discount Amount : Rs. " + discount);
        System.out.println("Amount to Pay   : Rs. " + payable);
 
        sc.close();
    }
}

Output

Sample Output 

CLOTH DISCOUNT CALCULATOR
-------------------------
Enter length of cloth (in meters): 1500
Enter total purchase amount (Rs.): 80000
Enter Customer Type:
D - Dealer
R - Retailer
Your choice: D
Discount Amount : Rs. 20000.0
Amount to Pay   : Rs. 60000.0

📝 Explanation

Inputs taken:

Length of cloth
Total purchase amount
Customer type (Dealer / Retailer)

switch-case checks customer type
if-else determines discount based on cloth length
Final payable amount calculated as:

Amount to Pay = Total Amount − Discount

Error message shown for invalid choice