Building a Simple Calculator App using HTML, CSS & JavaScript

1.Introduction In this blog, I will walk you through how I built a simple calculator web application using HTML, CSS, and JavaScript. This project is beginner-friendly and helped me understand core concepts like DOM manipulation, event handling, and basic JavaScript logic. 2.Technologies Used To build this calculator app, I used the following technologies: HTML – for structuring the calculator layout CSS – for styling and designing the user interface JavaScript – for implementing functionality and calculations 3.HTML Structure The HTML file defines the layout of the calculator. A container to hold the calculator An input field (#finalinput) to display user input and results Buttons for numbers, operators, and actions Each button uses the onclick attribute to perform actions like adding numbers or operators to the display. 4.CSS Design The CSS file is used to make the calculator visually appealing. Key styling features include: Flexbox to center the calculator on the screen Dark theme U