This tool allows you to perform basic arithmetic calculations directly on your webpage.

## How to Use the Calculator

Enter two numbers in the “Number 1” and “Number 2” fields. Select the operation you want to perform: Add, Subtract, Multiply, Divide, or Modulus. Click the “Calculate” button to get the result. The result will be displayed in the “Result” field.

### How It Calculates The Results

The calculator takes the two numbers you input. It uses the selected operation (add, subtract, multiply, divide, or modulus) to compute the result. If you select “Add,” it adds the two numbers. If you select “Subtract,” it subtracts the second number from the first. If you select “Multiply,” it multiplies the two numbers. If you select “Divide,” it divides the first number by the second (making sure the second number isn’t zero to avoid division by zero). If you select “Modulus,” it calculates the remainder of dividing the first number by the second (again ensuring the second number isn’t zero).

### Limitations

This calculator handles basic arithmetic operations. It doesn’t support complex calculations or significant digits beyond what is typically handled in simple arithmetic. Division and modulus operations will return an error if the second number is zero. Make sure to enter valid numerical inputs as non-numerical inputs will result in “Invalid input.”

## Use Cases for This Calculator

### Use Case 1: Addition Operation

Create a feature that allows users to input two numbers and see the sum instantly. Make sure the calculator can handle both positive and negative numbers. Provide a clear display of the result to ensure users can easily understand the outcome.

### Use Case 2: Subtraction Operation

Implement a subtraction function that enables users to subtract one number from another with ease. Make the calculator user-friendly by providing a simple interface for entering the numbers. Display the result in a prominent area so that users can quickly locate it.

### Use Case 3: Multiplication Operation

Include a multiplication feature that lets users multiply two numbers efficiently. Ensure the calculator can handle decimal numbers to accommodate different calculation needs. Display the multiplication result in a visually appealing way for better user experience.

### Use Case 4: Division Operation

Integrate a division function that allows users to divide one number by another accurately. Implement error handling for division by zero scenarios to prevent calculation errors. Display the quotient clearly to help users understand the division result.

### Use Case 5: Percentage Calculation

Add a percentage calculation option that enables users to calculate percentages easily. Provide clear instructions on how to input the values for percentage calculation. Display the percentage result prominently to assist users in obtaining the desired outcome.

### Use Case 6: Square Root Calculation

Incorporate a square root feature that allows users to find the square root of a number effortlessly. Ensure the calculator can handle complex numbers and display the square root result accurately. Make the square root calculation visible on the interface for user convenience.

### Use Case 7: Clear Button Functionality

Include a clear button that resets the calculator’s input fields and result display. Enable users to easily clear previous calculations and start fresh. Ensure the clear button is intuitively placed for quick access and enhanced user interaction.

### Use Case 8: Decimal Input Support

Implement support for decimal inputs to allow users to perform calculations with decimal numbers accurately. Enable users to input decimal values seamlessly without any syntax errors. Ensure the calculator can handle decimal calculations with precision for reliable results.

### Use Case 9: Keyboard Input Compatibility

Enable keyboard input compatibility to enhance user convenience when entering numbers and operations. Allow users to use the keyboard for input along with the on-screen buttons. Ensure all keyboard inputs are processed accurately for seamless calculation experiences.

### Use Case 10: Responsive Design for Mobile Devices

Optimize the calculator’s design for mobile devices with a responsive layout for varied screen sizes. Ensure all calculator functions are accessible and easy to use on mobile screens. Test the calculator on different mobile devices to guarantee a seamless user experience across platforms.