Building a Calculator with HTML, CSS, and JavaScript

Introduction

• Objective: Build a calculator using HTML, CSS, and JavaScript.
• Credits: Inspired by Code Spot channel.

Demo of the Calculator

• Main display: Bold black letters.
• History display: Lighter, smaller font above main display.
• All operations verified for accuracy.

Step-by-Step Guide

1. Setting Up the Project

• Create Folder: Name it calculator.
• Create Files:
  • index.html
  • style.css
  • app.js
• Initial Focus: HTML (we'll work on CSS and JS later).

2. Creating the HTML File

• Start Template: Use ! + Enter to generate basic HTML structure.
  • Change title to Calculator.
• Link CSS: Link the style.css file in the HTML.
• Google Fonts: Connect to Google Fonts API to use custom fonts.
• HTML Body: Simple structure to hold calculator buttons and display screen.
• Add Script Tag: Link app.js at the end of the HTML body.

3. Styling with CSS

• Container and Buttons: Initial styling.
• Background Color: E.g., purple.
• CSS Fixes: Adjust container height to 520px from 250px.
• Button Styling: Final touch-ups to make buttons look good.

4. Implementing JavaScript Functionality

• History Function: To retrieve and display user input above buttons.
• Button Interaction: Ensuring buttons record and display numbers correctly.
• Complete Functionality: Make sure all expected functionalities are implemented.

Final Checks

• Validation: Verify the calculations.
  • Example: 55 + 10 = 65
• Save All Files: Ensure all files (index.html, style.css, app.js) are saved.

Conclusion

• Thanks for Watching: Encouragement to like, subscribe, and comment.
• Feedback: Leave suggestions for future videos or areas needing help.