Calculator

Essential Features Despite its simplicity, a well-designed simple calculator app includes several thoughtful features to enhance the user experience: The Basic Arithmetic Suite: Large, high-contrast buttons for Addition (+), Subtraction (-), Multiplication (×), and Division (÷).Percentage Calculations: A dedicated percentage (%) key that makes it easy to calculate sales tax, discounts, or tips without manual decimal movement. Clear & All Clear (C/AC): Distinct functions to either delete the current entry or wipe the entire calculation string to start fresh. Floating Point Precision: Automatic handling of decimals to ensure that financial calculations (like $10.99 \times 3$) are accurate to the cent. Responsive Design: A layout that looks and feels natural whether the phone is in portrait or landscape mode, with buttons sized to prevent accidental "fat-finger" errors.