Write a program in Java to accept the total units consumed by a customer and calculate the bill. Assume that a meter rent of Rs. 500 is charged from the customer.

Java

import java.util.Scanner;
 
public class ElectricityBill {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
 
        int units;
        double bill = 0;
 
        System.out.print("Enter total units consumed: ");
        units = sc.nextInt();
 
        if (units <= 100) {
            bill = units * 0.80;
        } else if (units <= 300) {
            bill = (100 * 0.80) + ((units - 100) * 1.00);
        } else {
            bill = (100 * 0.80) + (200 * 1.00) + ((units - 300) * 2.50);
        }
 
        // Add meter rent
        bill = bill + 500;
 
        System.out.println("Total Electricity Bill = Rs. " + bill);
    }
}

Output

Sample Run 
Enter total units consumed: 350
Total Electricity Bill = Rs. 905.0

Calculation

First 100 units → 100 × 0.80 = 80
Next 200 units → 200 × 1.00 = 200
Remaining 50 units → 50 × 2.50 = 125
Energy charge = 405
Meter rent = 500
Total Bill = Rs. 905

📝 Explanation

Units are taken as input using the Scanner class
Slab-wise billing is applied using an if-else ladder
Meter rent of Rs. 500 is added at the end
The final bill is displayed in rupees