Category: Random letter guessing game javascript

Note: You'll need to know about for loops and if statements for this guessing game, so you'll need to have read all but the last of the beginner tutorials or already know all of these concepts.

In this guessing game, the computer will come up with a random number between 1 and The player must then continue to guess numbers until the player guesses the correct number. For every guess, the computer will either say "Too high" or "Too low", and then ask for another input. At the end of the game, the number is revealed along with the number of guesses it took to get the correct number. Ready to follow along to create this guessing game? All right. First, we're going to start by creating a new class, or Java file.

Call your new program GuessingGame, keeping the capitalization the same. If you're using Eclipse and I strongly urge you to! You should start out like this:. Ok, we need the computer to generate random numbers. Just add this code inside your main method so you have this:.

How To Create a Random Number Guessing Game With JavaScript

Don't worry much about how Random works. All you need to know for this guessing game is that the variable numberToGuess holds the integer that the player has to guess. Notice you'll get an error when you try to use Random. This is the same problem that Scanner has. All you have to do is right-click your work area, go to source, and select Organize Imports. This will take care of the problem for you.

If you want to just import manually, type in import java. Random; at the very top of the page.I'm trying to work through some exercises and learn JavaScript and I'm stuck. I've tried several different things and can't figure it out. I'm trying to make a number guessing game where, the user guesses a number between 1 and If they are too low, the games tells them they're too low and to try again. It does the same if their guess is too high. When they guess the number, the game is over and I print a string telling them how many guesses it took.

I have tried a while loop and a do while loop and I keep writing infinite loops. I can't figure out how and where to parse the string to an integer, I've tried several ways and none have worked. I also can't figure out how to loop through the question again if they are wrong. Also, your counter entry is never changed from 1. Next step would be to try to not use the prompt function to gather the new user number guess.

random letter guessing game javascript

Hello, you don't need a while loop because the function checks each time it runs. You should refrence the guess function for eah guess. Also, generate your random number outside the function. Here is what you are trying to do with comments. Try and fix yours before your look at it. I would suggest a prompt that has the result of the last guess such as " was too low. Next guess: ". If you do this in a for loop instead of whileyou can limit the user to 9 guesses and display the correct number if the user never found it.

Guess The Number Game Using Java with Source Code

That idea of enforcing a max guesses was cool. No error checking, input something that shouldn't be input and the thing crumbles. Suggest that regular expression is used to test the input.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

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Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. A javascript game where the user guesses what random letter the computer is thinking of. JavaScript Branch: master. Find file. Sign in Sign up. Go back.

Launching Xcode If nothing happens, download Xcode and try again. Latest commit Fetching latest commit…. Press any character on the keyboard to take a guess. After seven incorrect guesses, you lose. The computer will keep track of your score. To see what letter the computer is thinking of, open the console! You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window.This JavaScript number guessing game project's objective is to code a game where the user must guess a randomly generated number from 1 to This JavaScript number guessing game project was fun to build.

The game that I have hosted on github is slightly different than what the instructor created. First, I change a lot of the CSS styling. For whatever reason, the instructor styled most of the HTML elements with a left margins and left paddings, which made the elements off-center. I changed this to make the game look much more pleasant to me.

This meant that the user had to actually click a button with mouse each time a guess was submitted. I changed the project so that the input box was wrapped in an HTML form.

With this change, the user could simply key in a guess and press the ENTER key or click the submit button. It made the game much more fun to play.

random letter guessing game javascript

Last, the instructor created a game with values from 1 to I changed my game to use values from 1 to Both games still give the user 10 changes to guess the number. Coding as many projects as I have and learning to debug them has certainly helped with memory recall. I was tried to check if the condition were true, which I know it was.

So, my code would have never gotten through. Learning more about JavaScript's execution context also helped me code this project relatively quickly. I easily determined which variables were accessible to which functions instead of beating myself up, like I would do in the past, when I couldn't find out what was going on.

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This project took me about two hours to code the JavaScript functionality completely on my own, having never looked at the instructor's code. JSBeginners curates and provides resources to JavaScript projects so you can select and build them on your own, in order to become a better JavsScript developer. Your email address will not be published. Enter your email below and I'll send you one email per week with completed JavaScript projects you can do in your spare time!

random letter guessing game javascript

Email address:. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.We are going to use some of the concepts learned in that session, and add to your knowledge with even more tricks. Because Khan Academy is an excellent environment for learning JavaScriptand in particular, for learning the graphics programming we will do next week, we will use their environment.

If you prefer another environment like Thimble by MozillaCodePen. In this lesson, we will make two games that run in a browser. First up is "the number guessing game". Then, we will use that code to form the start of "Hangman". The most important thing to observe from this simple HTML is that a call is made out to JavaScript when the player makes their guess. In this case, the "guessOne " function will be called.

In prior lessons, you may have seen the use of javascript's alert and prompt. As you learn more, you will find that alerts and prompts are good to avoid. Some development environments actively disallow them. Khan Anademy is one that disallows alerts in JavaScript.

Other development environments may run your JavaScript on every key press, and the alert or prompt dialog box can be very annoying. So, from this point on, we will send any output to a web page element we prepared for our use. In this example, we are going to write everything we need to tell the player into the area with the "message" id. Before diving into the technical details, there's one more thing.

In Khan Academy's site, there is no easy way to have your html call your own javascript that is in a separate file.

Guess the Number Game in JavaScript

This differs from Thimble and JsBin. So, while using Khan Academy, we will go back to the approach of putting the JavaScript code right into the html page.

The most important thing to observe is that we declared that we have a function called javascript guessOnewhich is the code that gets called when the guess button is clicked. We'll talk about that code in a minute. First, let's talk about variables. Remember that code is written to tell the computer what to do AND to tell programmers how you are doing it.

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Using good variable names helps make your code understandable. Placing the variables in the right place helps, too. These variables need to be kept alive between runs of the code, so they are not in the guessOne function. This means they are global variables. You should use as few global variables as possible, and professional developers have ways of not using global variables at all.

Notice that JavaScript pulls the player's guess out of the "guess" field and puts it into the variable named "guess". This variable is declared inside the guessOne function and will disappear when the guessOne function completes.

Next, notice the "control logic".By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up.

I am a first year CS student. We are currently learning Java and my latest assignment was to create this random number game. I am hoping to get some feedback on code style etc so that I know what not to do in the future and so that I can avoid getting into bad habits from the start. You're using Eclipse. Eclipse and NetBeans are IDE's that will probably aside from turning them off give you warnings about your code. Your IDE will give you other warnings from time to time.

If you look at the warnings it gives you, it will help in both debugging "hey, you're calling a function on a null variable here! Increase tries by 1. If the guess is correct, report the number of tries taken.

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If the guess is incorrect, report whether it is lower or higher than the hidden number. Return true if the guess was correct, and return false if the guess was incorrect. If a number is not equal to and not lower to a certain value, then obviously it must be higher than that value. And we can always go further extracting the condition can make it easier to handle return values:. Which turns a large function into several smaller functions, each easier to grasp than the original function you started with.

This is a pretty good implementation of what you've set out to do. The naming of things is clear and the code is pretty well split up into methods. I'd maybe put a slightly clearer explanation of what the user is expected to do at the start, as well as your "enter an upper limit". This is usually an excuse to break out your finest ascii art. Something else to consider is what if your user doesn't enter an integer?

That will break your program, so putting in some error handling that asks your error-prone meatbag to try again and get it right this time, please. Your way of checking is to put the scan. When you're asking the player if they want to play again, you set running to true, but there's no way for it not to be true, so that's unnecessary.

You're repeating yourself less and the return value is the same regardless. The same goes for the next part, instead, I'd have:. This looks quite good to me. In particular, I like how Game is its own class. That was the right decision, so good job. One thing I would recommend is not having "side effects" in Game.

In this case, that means not writing to System. Though it doesn't make much difference in a small program like this, it generally leads to more reusable, testable code, and is a good habit to get in to. The only other thing I can see right now is that you could make range final. That means that once assigned to, its value cannot be changed. It makes your intention clear to people reading your code, and the compiler will tell if you that rule has been violated. Your main function is clumsy due to the superfluous use of two flag variables, win and running.

In general, using flag variables to control execution flow is poor style. There are more assertive ways to get to where you want to go:. As for Game.I am having trouble with my code. I want to create a guessing game but I don't know where my code is messing up at.

Can anyone help me? So, I made some changes but I still can't figure out what else is wrong. I want the game to make people input numbers in the text field and then get their results but I can't get the text field to work and not its automatically running the results on its own.

BTW, my Chrome also have no idea what is the meaning of this code lines. Could you explain what you've tried to do? To be honest, there was quite a bit wrong with everything about your code. Not only what was pointed out in the answers already, but logic errors and wrong attributes in elements. But that's why I've come to help.

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I rewrote your game into a little codepen you can play with below. I wrote lots of comments so check those out to see what I did for ya! I am still having trouble with the "reset" button.

I want the button to reset the game and generate a new random number. Here's the code for the clearFields function that I updated the codepen with, as well. Also, I'm sure you noticed that I greatly changed the code for your random number generation. I wrote up an article on that and posted it here on Treehouse as an answer, but I couldn't find it : If you have any questions about how that piece of code operates, I'll explain the math and logic behind it.

Also, if you have any other questions, feel free to ask. I did a major update to the checkGuess function so that blank guesses don't get counted.

I updated the comments, too! I don't know what happened to your article, but I would love to take a look at it. Try posting it again.