FINAL

Code

/// Name: Justin Li
/// Period 7
/// Program Name: DisplayProbability
/// File Name: DisplayProbability.java
/// Date Finished: 1/21/16

import java.util.Scanner;
import java.util.Random;

class DisplayProbability {
  
    public static void main(String[]args) {
      
        Random r = new Random();
        Scanner keyboard = new Scanner(System.in);
        int total, coin;
        double probability, probability2, amount, heads, tails;
        coin = r.nextInt(2);
        heads = 0;
        tails = 0;
        amount = 0;
            
        do {
            System.out.println("How many flips would you like?");
            total = keyboard.nextInt();
        } while ( total > 2100000000 || total < 1);
//I used a do while loop because it worked. lol
        do {
            if (coin == 1){
                System.out.println("IT IS HEADS");
                total = total - 1;
                coin = r.nextInt(2);
                heads = heads + 1;
                amount = amount + 1;
            }
            else if (coin == 0) {
                System.out.println("IT IS TAILS");
                total = total - 1;
                coin = r.nextInt(2);
                tails = tails + 1;
                amount = amount + 1;
            }
            
        } while ( total < 2100000000 && total > 0);
        
        probability = heads / amount * 100;
        probability2 = tails / amount * 100;
        System.out.println("\nIt landed on heads " + heads +" times.");
        System.out.println("\nIt landed on tails " + tails +" times.");
        System.out.println("\nThere was a " + probability + "% chance that it landed on heads.");
        System.out.println("\nThere was a " + probability2 + "% chance that it landed on tails.");
        
          
    }
}
//The higher the number, the closer it will get to 50/50 chance.
    

Picture of the output