Javascript calculator codepen

GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Objective: Build a CodePen. Fulfill the below user stories. Use whichever libraries or APIs you need. Give it your own personal style. User Story: I can keep chaining mathematical operations together until I hit the equal button, and the calculator will tell me the correct output.

When you are finished, click the "I've completed this challenge" button and include a link to your CodePen. 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. JavaScript Calculator for freecodecamp. 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…. User Story: I can add, subtract, multiply and divide two numbers. User Story: I can clear the input field with a clear button. Remember to use Read-Search-Ask if you get stuck.Javascript lets you do all that you will never have thought about. At this time JavaScript is one of the most demanding languages. You will find this calculator programs on a very well-known website like CodePenbut those programs will be very advanced.

If you are a beginner or are looking for simple codethen those codes will be difficult for you to understand. This is very simple but useful program. When I started learning Javascriptin the second class I expressed my desire to learn this from my teacher.

Copy these codes and save it with the name that is given here. I would recommend that first understand this code and then use it anywhere. So, if you have to make it yourself, you do not have to copy the code repeatedly. I had been created in 2 separate files So that the code does not get long. I Know this is very basic, but always remember basic is most important.

This is my Opinion. Hope you enjoyed this article, if you feel this is useful for you, then you can increase our morale by sharing. If you have any questions or want to say something, then you can comment below.

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Hello there! Do you know if they make any plugins to assist with Search Engine Optimization? If you know of any please share. Many thanks!By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. When the user enters numbers, "Number 1" and "Number 2", then the following should occur for addition, subtraction, multiply and division for example :.

You need call the function num when finish the showcalc function. Yes, you repeatedly repeat yourself :p. Learn more. Calculator with Javascript Ask Question. Asked 7 years, 1 month ago. Active 4 years, 1 month ago. Viewed 38k times. I am a beginner and trying to write a simple Calculator in Javascript but something is wrong.

javascript calculator codepen

Ian Mary Mary 87 2 2 gold badges 2 2 silver badges 7 7 bronze badges. You've used the 'java' tag. This question is javascript, it has nothing to do with java.

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Perhaps you could offer a few more details? Have you tried using a javascript debugger? Try something like JSFiddle: jsfiddle.

This question is oddly similar to: stackoverflow. Active Oldest Votes. Guillermo81 Guillermo81 10 10 bronze badges. Niet the Dark Absol Niet the Dark Absol k 61 61 gold badges silver badges bronze badges. Why parseInt? Sign up or log in Sign up using Google.This is an epic article where you learn how to build a calculator from scratch. Before you attempt follow through the lesson, please make sure you have a decent command of JavaScript.

Minimally, you need to know these things:. I urge you to try and build the calculator yourself before following the lesson. This has already been done for you in the starter file. You can find the starter file at this pen.

javascript calculator codepen

The first steps to building this calculator are to be able to 1 listen for all keypresses and 2 determine the type of key that is pressed. In this case, we can use an event delegation pattern to listen, since keys are all children of. Next, we can use the data-action attribute to determine the type of key that is clicked.

If the key has a data-action that is either addsubtractmultiply or dividewe know the key is an operator. At this point, if the calculator shows 0 the default numberthe target number should replace zero. If the calculator shows a non-zero number, the target number should be appended to the displayed number. We can get these two values through the textContent property of the clicked key and.

If the calculator shows a non-zero number, we want to append the clicked key to the displayed number. To append a number, we concatenate a string.

javascript calculator codepen

When Mary hits the decimal key, a decimal should appear on the display. If Mary hits any number after hitting a decimal key, the number should be appended on the display as well.

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If Mary hits an operator key, the operator should be highlighted so Mary knows the operator is active. When Mary hits a number key again, the previous display should be replaced with the new number. The operator key should also release its pressed state. To release the pressed state, we remove the is-depressed class from all keys through a forEach loop:.Hey web people!

I work on CodePen a playground for front end web design and development. Every Pen has its own Settings. There are thousands of CDN-hosted libraries we offer through typeahead. Now you can use ES features and Babel will process them down to older version of JavaScript so what you write works everywhere. You can also write ES stuff without using Babel as well, but you may run into browser support issues like you would any other cutting edge feature.

Mini tip! So the URL parameter:.

React JavaScript Calculator freeCodeCamp tutorial - OUTDATED

Passing a 2 as the last number maximizes the console. In this way you could share a Pen where the output is intentionally only for the console. Babel, awesomely, also supports the JSX syntax. TypeScript will process the JSX as well!

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You can do that! This way you can create multiple Pens that all use the same JavaScript, so it may be easier to update. This works for CSS in the same way. For example, if you want to access just the JavaScript from another Pen, add. You could Ajax for that and use it elsewhere. Or cURL for it, or whatever else. This can be useful for storing data in another Pen as to not muddy up the JavaScript in the Pen you are working on.

In some sense, people can learn from any Pen on CodePen. Some people even make Pens that are specifically about teaching something. Our blogging feature is used almost entirely for technical writing in the spirit of teaching.

But CodePen has other, more direct ways of teaching.

Simple calculator program with HTML, javascript & jQuery

For example, Professor Modewhich allows other people to watch you code in real time, as well as chat with you and each other. Collab Mode is useful for teaching too: it allows multiple people to work on a Pen at the same timemeaning the teaching can happen hands-on. An in my opinion! JavaScript is no exception here. When CodePen detects an error, it will highlight the line and show an icon. Click the icon to reveal the error message, which may be helpful in understanding the problem.

CodePen will even try and prevent you from executing infinite loops which are bad because they lock up the browser and may prevent you from saving your work. CodePen lints your processed JavaScript. If JS Hint finds something to warn you about, it will flip over to the compiled code to show you there.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'm just starting out with code. I created a very basic JavaScript calculator. While writing, I couldn't help but think that there must be easier, faster and less redundant ways to write this.

Basic JavaScript Calculator Source Code | HTML, CSS

It would also be great if I could get some comments on the style of the code. I really want to know what the best coding practices are. It stops variables from leaking into global scope. This is only a problem in browser JavaScript; in Node.

The 'use strict' directive tells the engine to run the code in strict mode. In a nutshell, strict mode throws more errors, prohibits the dreaded with statement, and throws an error if you try to assign to an undeclared variable. It's useful for finding mistyped variables:. You should use strict mode all the time, in development and production, unless you need a 0.

If you use Babel it outputs code in strict mode. But try to avoid using! Also, you can set cursor: pointer on. There's no visual difference, except for the specificity of the selectors. It does what you think it'll do. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.

Making a Calculator with Basic HTML, CSS and JavaScript

A very basic JavaScript calculator Ask Question. Asked 3 years, 10 months ago. Active 3 years, 10 months ago. Viewed 6k times.

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Active Oldest Votes. HTML structure. It's just a matter of style. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

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Q2 Community Roadmap. Featured on Meta. Community and Moderator guidelines for escalating issues via new response….In this tutorial we will create a Simple Calculator using Javascript. JavaScript is a scripting or programming language that allows you to implement complex things on web pages. It is widely used in designing a stunning website. It is an interpreted programming language that has a capabilities of Object-Oriented.

This code can be used as your calculator to any mathematical problem. So Let's do the coding. This code contains the main function of the application. This code is the source code of the calculator that display the designed of the application. This will calculate the equation when the equal button is pressed. To create this just write these block of code inside the text editor. Note: Due to the size or complexity of this submission, the author has submitted it as a.

After downloading it, you will need a program like Winzip to decompress it. Virus note: All files are scanned once-a-day by SourceCodester. Re-scan downloaded files using your personal virus checker before using it. Javascript - Simple Calculator. Submitted by razormist on Tuesday, March 13, - Your name. About text formats. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.


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