Question

Write a program that calculates the amount a person would earn over a period of time if his or her salary is one penny the first day, two pennies the second day, and continues to double each day. The program should display a table showing the salary for each day, and then show the total pay at the end of the period. The output should be displayed in a dollar amount, not the number of pennies. Input Validation: Do not accept a number less than 1 for the number of days worked.

Basic Java language please

Answer 1

Have a look at the below code. I have put comments wherever required for better understanding.

import java.util.*;

class Main {
  public static void main(String[] args) {
    // create scanner object to take user input
    Scanner sc = new Scanner(System.in);
    // create variable to store number of days
    int days; 
    System.out.println("Enter the total number of days:");
    // Take input with proper validation
    while (true){
      days = sc.nextInt();
      // if user input is less than 1, give proper message and take input again
      if(days<1){

        System.out.println("Please enter a number greater or equal to 1");
      }
      else{
      // if input is greater or equal to 1 then proceed 
      // create an array to store salary
      double[] table = new double[days];
      // intialize day 1 salary as 1 penny
      int n = 1; 
      // loop in through the days
      for (int i=0;i<days;i++){
        // conver pennies to dollar
        table[i] = n/100.0;
        // double the salary
        n*=2;
      }
      // display the result
      for (int i=0;i<days;i++){
        System.out.print("$");
        System.out.print(table[i]);
        System.out.print("\t");


      }
      break;
    }
    }
    
  }
}

Happy Learning!