The percentClickHandler function checks if there’s any entered value ( num) or calculated value ( res) and then calculates the percentage using the built-in Math. Wrapper.js import './Wrapper.css' const Wrapper = ( percentClickHandler We will be building a simple Calculator with 4 basic operations: addition, subtraction, multiplication, and division. It will also allow us to center the whole app afterward. Building a Responsive Calculator in Javascript is a good beginner project for learning Web Development, and it is quite simple if you know basics like HTML, CSS, and Javascript (beginner level). The Wrapper component will be the frame, holding all the children components in place. To obtain a modulo in JavaScript, in place of n d, use ( (n d) + d) d. If you don’t want to create those folders and files manually, you can use the following one-liner to get things set up quickly: cd src & mkdir components & cd components & touch Wrapper.js Wrapper.css Screen.js Screen.css ButtonBox.js ButtonBox.css Button.js Button.css For two values of the same sign, the two are equivalent, but when the operands are of different signs, the modulo result always has the same sign as the divisor, while the remainder has the same sign as the dividend, which can make them differ by one unit of d.

Those are Wrapper, Screen, ButtonBox, and Button.įirst create a components folder inside the src folder. Now open this saved HTML file in any web browser (e.g: Internet Explorer with ActiveX Enabled) to get result something like this.Since we’ve already done some wireframing, we already know the main building blocks of the application. JavaScript Output - Perform Arithmetic OperationsĬopy and paste above HTML Code in a notepad and save it as JavaScript-Calculator.html.

tag (HTML Forms Concept) with onclick.->Ī=Number() ī=Number() ĭownload JavaScript Calculator HTML Code Here : JavaScript Calculator!

Simple Javascript Calculator - Basic Arithmetic Operations JavaScript Code - Simple JavaScript Calculator To understand more, How Javascript Works? I recommend you refer this JavaScript Tutorial. HTML calculator is used for performing basic mathematical operations like Addition, subtraction, multiplication, and division. I hope it may prove useful to those interested in learning javascript functions, hence feel like sharing. This Javascript application is very simple, necessarily commented and is easy to understand. I gave it a try to write this small calculator application (using Javascript and HTML Forms) and managed to produce following working script.

Javascript calculator