Basic Calculator

Compact Calculator – Description

This Compact Calculator is a modern, responsive, and easy-to-use web calculator designed for quick mathematical calculations. It supports basic arithmetic operations, keyboard input, and calculation history tracking with download options.
The calculator works smoothly on desktop and mobile devices and is fully compatible with Google Sites embed code.

 Features

• ➕➖✖➗ Basic arithmetic operations

• ⌨️ Full keyboard support

• Calculation history panel

• 🔁 Click history to reuse results

• Download history as TXT or CSV

• Responsive & mobile-friendly design

• Clean dark UI with smooth scrolling display

How to Use the Calculator

Using Buttons

• Click number buttons 0–9 to enter values

• Use + − × ÷ for operations

• Press = to calculate

• Press C to clear the display

• Press ⌫ to delete the last digit

 Using Keyboard (Fully Supported)

Key                                                                               Action

0–9                                                                                Enter numbers    

+ − * /                                                                            Operations

.                                                                                    Decimal

Enter / =                                                                       Calculate

Backspace                                                                   Delete last digit

Esc                                                                              Clear display

You can type directly without clicking anywhere. 

Calculation History

• Every calculation is automatically saved

• History appears below the calculator

• Click any history entry to reuse the result

• Scroll to see older calculations

 History Controls

• Clear → Removes all saved history

• TXT → Downloads history as a text file

• CSV → Downloads history as a spreadsheet-ready file

📂 Downloaded Files Format

TXT File

12+8 = 20

5*6 = 30

45/9 = 5

CSV File

Calculation

12+8 = 20

5*6 = 30

45/9 = 5

Compatibility

• ✅ Chrome, Edge, Firefox, Mobile browsers

• ✅ No external libraries required

• ✅ Works offline after loading