1. About the CAT On-Screen Calculator

The CAT On-Screen Calculator is a virtual calculator designed for computer-based tests and everyday calculations. It provides basic arithmetic functions in a simple, easy-to-use interface.

2. How to Use the Calculator

Basic Operations:

• Click the number buttons to enter values
• Use the operator buttons (+, -, *, /) for calculations
• Press 'C' to clear the display
• Press '=' to calculate the result

3. Features

• Basic arithmetic operations (addition, subtraction, multiplication, division)
• Decimal point support
• Clear display function
• Responsive design works on all devices

4. Keyboard Shortcuts

• 0-9: Number keys
• + - * /: Operator keys
• Enter: Equals (=)
• Esc or Delete: Clear (C)

5. Frequently Asked Questions (FAQ)

Q1: Can I use this calculator for exams?
A: This calculator is suitable for most computer-based tests that allow basic calculators.

Q2: Does this calculator support scientific functions?
A: No, this is a basic calculator. For scientific functions, please use our scientific calculator.

Q3: How accurate are the calculations?
A: Calculations are performed with JavaScript/PHP floating-point precision.

Q4: Can I use the keyboard instead of clicking?
A: Yes, most operations can be performed with keyboard shortcuts.

Q5: Is there a memory function?
A: Not in this basic version. Our advanced calculator includes memory functions.

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