PizzasAndPeopleWithInputValidation.java

import java.util.Scanner;

public class PizzasAndPeopleWithInputValidation {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        // Prompt for the number of pizzas
        System.out.print("How many pizzas: ");
        int numberOfPizzas = scanner.nextInt();

        // Prompt for the number of slices per pizza
        System.out.print("how many slices per pizza: ");
        int slicesPerPizza = scanner.nextInt();

        // Prompt for the number of people
        System.out.print("How many people: ");
        int numberOfPeople = scanner.nextInt();

        // Calculate the total number of slices
        int totalSlices = numberOfPizzas * slicesPerPizza;

        if(numberOfPizzas < 0 || slicesPerPizza< 0 || numberOfPeople < 0 ){
            System.out.println("Invalid input. PLease enter non-negative numbers.");
            scanner.close();
            return;
        }

        // Display the result
        System.out.println("If you spilt all this pizza evenly among " + numberOfPeople + " people you will have " +totalSlices + " slices left over");
        System.out.println("Mmmm! Cold pizza...");

        scanner.close();
    }
}