Question

java programming language

Problem3 (1.5 points). Write a Java program to input electricity unit charges and calculate total electricity bill according to the given condition: For first 50 units Rs. 0.50/unit For next 100 units Rs. 0.75/unit For next 100 units Rs. 1.20/unit For unit above 250 Rs. 1.50/unit An additional surcharge of 20% is added to the bill Problem4 (1 points). Write a Java program to inputs weekday number and prints the weekday name using switch.

Answer 1

The Java programs for your requirement given below,

Problem3 Java code:

import java.util.Scanner;

public class ElectricityCharge {
   public static void main(String aa[]) {
       double units, charge = 0, additional, total;
       Scanner ss = new Scanner(System.in);
       System.out.println("Enter Electricity unit");
       units = ss.nextDouble(); // get units from user
       if (units > 0 && units <= 50) {
           charge = units * 0.50; // calculate charge
       } else if (units > 50 && units <= 150) {
           charge = units * 0.75;
       } else if (units > 150 && units <= 250) {
           charge = units * 1.20;
       } else if (units > 250) {
           charge = units * 1.50;
       }
       additional = charge * 0.2; // calculate additional charge
       total = charge + additional; // calculate total amount
       System.out.println("total electricity bill=" + total);

   }

}
Sample output:

Enter Electricity unit 100 total electricity bill=90.0

Note: Read comments for better understanding of the Java code

Problem4 Java code:

import java.util.Scanner;

class WeekDays {
   public static void main(String s[]) {
       int day;
       Scanner ss = new Scanner(System.in);
       System.out.println("Enter weekday number"); // get weekday number from user
       day = ss.nextInt();
       switch (day) {
       case 1:
           System.out.println("Sunday");
           break;
       case 2:
           System.out.println("Monday");
           break;
       case 3:
           System.out.println("Tuesday");
           break;
       case 4:
           System.out.println("Wednesday");
           break;
       case 5:
           System.out.println("Thursday");
           break;
       case 6:
           System.out.println("Friday");
           break;
       case 7:
           System.out.println("Saturday");
           break;
       default:
           System.out.println("Enter valid week day number");
           break;
       }
   }
}

Sample output:

Enter weekday number 7 Saturday

Note : I considered sunday as a day 1 and Saturday as day 7.