📱 Basic Calculator

This calculator supports basic arithmetic operations and includes several utility functions.

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🖥️ Display

• Top display screen shows the current input or result.
• Starts with 0 and updates as you enter numbers and operations.

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🧮 Button Functions

🔘 Top Row

Button	Function
AC	Clears all input and resets the calculator to 0
±	Toggles the sign of the current number (positive/negative)
%	Converts the current number to a percentage (divides by 100)
÷	Division operation

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🔢 Number Buttons (0–9)

• Used to input numeric values.

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✖️ ➕ ➖ Arithmetic Operations

Button	Function
×	Multiplication
−	Subtraction
+	Addition

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⬇️ Bottom Row

Button	Function
0	Input the number 0
.	Adds a decimal point to input a floating-point number
=	Calculates the result based on entered expression

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📝 Example Usage

1. Addition: Tap 2, then +, then 3, then = → Display shows 5

2. Percentage: Tap 50, then % → Display shows 0.5

3. Change Sign: Tap 9, then ± → Display shows -9

4. Clear All: Tap AC → Display resets to 0

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📌 Notes

• Only one operation can be performed at a time (e.g., no parentheses or order of operations).
• Decimal calculations are supported.
• The calculator operates immediately when = is pressed.