1. About This Calculator

This calculator performs basic arithmetic operations (addition, subtraction, multiplication, and division) with both positive and negative numbers. It handles all standard arithmetic rules for negative numbers.

2. How It Works

The calculator follows standard arithmetic rules:

3. Working with Negative Numbers

Rules for Negative Numbers:

• Adding a negative is the same as subtraction
• Subtracting a negative is the same as addition
• Multiplying/dividing two negatives gives a positive result
• Multiplying/dividing one negative and one positive gives a negative result

4. Using the Calculator

Instructions: Enter any two numbers (positive or negative), select an operation, and click Calculate. The calculator will show the result with proper handling of negative values.

5. Frequently Asked Questions (FAQ)

Q1: How does the calculator handle negative numbers?
A: It follows standard arithmetic rules for negative numbers in all operations.

Q2: What happens if I divide by zero?
A: The calculator will display "Undefined (division by zero)" as division by zero is mathematically undefined.

Q3: How many decimal places does it show?
A: Results are rounded to 4 decimal places for clarity.

Q4: Can I use very large numbers?
A: Yes, within the limits of standard floating-point arithmetic in PHP.

Q5: Does it follow order of operations?
A: This calculator performs one operation at a time between two numbers, so order of operations isn't applicable.