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powerball simulator

Powerball simulator

Allows user to simulate the lottery by picking numbers and playing Powerball! They can play Powerball at zero the cost and probably the same amount of winnings as real Powerball (zero. because winnning the lottery is impossible). Can be found here: http://power-ball.herokuapp.com

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Powerball Simulator. Contribute to rbtnguyen/powerball development by creating an account on GitHub.

JavaScript: How to Create a Powerball Simulator

James Hooper
Jun 30, 2018 · 9 min read

M ost games rely heavily on the elements of chance. In the digital world, games and the element of ch a nce are made possible with random numbers. We will be using JavaScript to explore how to use the Math.random() function. I will demonstrate how easy it is to use this method by creating a Powerball simulator. You will experience first hand just how high the odds are of winning the Powerball. The odds are approximately 1 in 292 million. In order to grasp how random these numbers are and how lucky you must be to pick all seven numbers correctly, you must delve into the Math.random() function.

Before we begin creating the Powerball simulator in JavaScript, you need to set up a basic HTML page. You also need to create a CSS file. If you are a beginner, carefully review the code below and this will help you get set up correctly.

Step 1: Setting Up the HTML

Step 2: Creating the CSS stylesheet

To add the CSS stylesheet, create a new blank file in your text editor of choice and just copy and paste the following code below into a new file and name it style.css.

Step 3: Creating the JavaScript file

The next step is creating the JavaScript file and naming it script.js. To copy and paste the entire JavaScript file for this project, you can find the script.js file at the end of this article or make life simple and download the entire project at GitHub: https://github.com/jamesdesigns/Powerball-Simulator.

We need to begin creating variables and assigning these variables a value that will generate random numbers. You use variables to store, retrieve, and manipulate values that appear in your code. Declaring a variable is simple to do. Begin your statement with a var and add an appropriate name that will be placed after the var. Once you have the var name established, assign it a value by using an equals sign.

e.g., var num = Math.floor(Math.random() * 101);

If you want to create a random number between 0 and 100 you could use the floor function to round down.

The floor method cuts off everything past the decimal, leaving only the integer portion. The random number generated from the code above would generate numbers between 0 to 99. However, if you want a random number between 0 and 100, you would use: Math.floor(Math.random()*101);. In our new Powerball game we will be entering digits between 0 and 100. This means we are going to use: Math.floor(Math.random() * 101);

Step 4: Creating the Function

Now that you know how to create a random number, it is time to get down to business and start building our code to function like a Powerball simulator. All the instructions for our Powerball simulator is going to be defined inside of a function which lies within the opening and closing curly brackets . We will call this function playGame.

The great thing about programming with JavaScript is the unlimited number of ways you can create a simulator using conditional statements. I encourage any JS developer to take this project and run with it. This example I am demonstrating is an ongoing project. Feel free to play around with this Powerball simulator.

Now it’s time to look at how we will set up the source code and explain what is going on here. The first part of the function defines the random numbers and then it will compare those numbers to the user’s guesses. Notice all seven variables declared for the user’s guesses is highlighted in the yellow box from lines 17–23.

In order to compare the numbers that the user enters you must parse the number into an integer. Anytime you have a user fill out an input field in the HTML it is entered as a string value. To compare an integer, it must be equivalent to another integer. An integer value is not equivalent to a string value. This is why it is so important to use the parseInt for each guess the user enters. Our code is now structured appropriately and will help us come up with seven random numbers to compare with.

The most important part of this entire game is the ability to compare the numbers entered with the random numbers generated. This is what we call conditional operators. It will compare the user’s guess to see if there are any matches and output the results into the HTML. We have to create conditional operators to compare the amount of numbers that match and have it output a message if there is a match, such as “You Lose!”, “You Win!”, or even something to the effect of “You have 2 matches!”. This is where you can have fun and come up with your own creative way of handling this game.

You always want to write JavaScript in the most efficient way possible. I may be coming back to these conditional operators to find a better way of handling this process. However, these conditional operators do work well and gets the results we need. Here is a snippet of our conditional operators:

Conditional statements are used to perform different actions based on different conditions. In this project I am using the if…else statement to compare the random number with the user’s number.

e.g., if(num1 === userNum1 || num2 === userNum2) >.

Once you create as many conditional operators as you need, you now have the logic set in place. The last thing we need to add inside of our function is invoking the playGame function. In order to execute a function, you must invoke the function or it will never execute. To do this you simply add this to the bottom of your JavaScript file: e.g., playGame();

Be sure this is placed outside of the opening and closing curly brackets of your function! Here is an example to help demonstrate what I mean:

Step 5: Play the Game!

You now have a basic Powerball simulator. Be sure to hit the play button several times over. You just might get more than three numbers matching at any given point.

Hopefully you found this article helpful and you are now excited to create your own custom Powerball game. When I began to play this game, I realized that it seems absolutely impossible to have all seven numbers matching. More often than not you will get two numbers that match, but any more than that seems unrealistic. I suppose this exactly why there is a 1 in 292 million chances of you ever getting seven numbers to match exactly.

Most games rely heavily on the elements of chance. In the digital world, games and the element of chance are made possible with random numbers. We will be using JavaScript to explore how to use the… ]]>