Page 142 - KEC Khaitan C5 Flipbook
P. 142
currentInput = "";
previousInput = "";
operator = "";
setText("display", "");
});
Step 4: Test the Calculator
Run the app and check that:
o Numbers appear on the display.
o Operators perform correct calculations.
o The clear button resets the display.
Debug any issues by reviewing event listeners and variables.
Step 5: Enhance the Calculator
Add Features:
o Include a decimal point button for floating-point calculations.
o Add a backspace button to delete the last character.
o Implement percentage or square root functionality.
Improve UI:
o Highlight operator buttons when selected.
o Animate buttons on click.
Error Handling:
o Display error messages for invalid inputs (e.g., division by zero).
Key Takeaways:
Event Listeners handle user interactions, making the app responsive.
Variables and Conditionals process and store user input for calculations.
User Interface Design enhances usability and experience in app development.
Happy Coding!
140 Premium Edition-V

