Problem 1

import java.util.Scanner;
import java.util.Stack;

/**
 * PROBLEM *
Write a program to insert 5 float values in a dynamic list.
Now take user input for a variable named “option”.
If the option is 1 then insert another value.
If option is 2 delete the top value from the list.
If the option is 3 just output the top value.
Apply stack list to implement the above-mentioned solution and use proper stack methods.
**/

public class Problem1 {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Stack<Float> stack = new Stack<Float>();

        // Inserting 5 values in a dynamic list (Stack)
        System.out.print("Enter 5 float values: ");
        for (int i = 0; i < 5; i++) {
            stack.push(scanner.nextFloat());
        }

        System.out.println("Dynamic list: " + stack + "\n\n");

        // Taking user input in varriable "option"
        System.out.print("Enter your option (1/2/3): ");
        int option = scanner.nextInt();

        switch (option) {
            case 1:
                System.out.print("User option is 1. So enter a value to insert into the list:  ");
                stack.push(scanner.nextFloat());
                System.out.println("\n" +"Dynamic list: " + stack + "\n\n");
                break;
            case 2:
                System.out.println("User option is 2. So deleting top value from the list...  ");
                stack.pop();
                System.out.println("\n" + "Dynamic list: " + stack + "\n\n");
                break;
            case 3:
                System.out.print("User option is 2. So top value is : " + stack.peek());
                break;
        }


        scanner.close();
    }

}