Simple JavaScript Calculator

Overview

This is a simple calculator built with HTML, CSS and Vanilla Javascript that provides basic functionality.

This calculator project is hosted here.

Functionality

This calculator supports basic arithmetic operations and functionality such as:

• addition (+);
• subtraction (-);
• multiplication (*);
• division (/);
• modular division (%);
• clear all (AC);
• delete (DEL).

The calculator makes a basic check to see if the expression entered by the user is correct and controls user input:

• it ensures that there are no leading zeros (e.g., 01 is corrected to 1);
• multiple consecutive dots are not allowed (e.g., invalid input like 0...1..0 is prevented);
• it checks the parity of the entered parentheses (e.g., invalid input like ())( is prevented);
• input of opening ( paratheses right after ), . and numbers is prevented;
• input of closing ) paratheses right after (, . and arithmetic operations symbols is prevented;
• input of arithmetic operations symbols right after ( is prevented (except -)).

Execution

1. Clone the repository

   git clone https://github.com/SofiiaTrokhymchuk/vanilla-js-calculator.git

2. Open index.html or run on VS Code using Live Server plugin.

Contributing

Contributions are welcome. If you have a suggestion to make this project better, please:

1. Fork the project;
2. Create your branch:

git checkout -b <suggestion-branch-name>

3. Commit your changes:

git commit -m 'Add/Fix something'

4. Push to your branch:

git push origin <suggestion-branch-name>

5. Open a Pull Request.

You can also create an issue with bug or enhancement tag. Please, give this project a star if you like it. Thank you!