How to Use the Calculator App
A Calculator App is a digital tool designed to perform basic arithmetic operations like addition, subtraction, multiplication, and division.
What This App Does:
This browser-based calculator lets users enter expressions using on-screen buttons, displaying and calculating the result instantly using JavaScript’s built-in evaluation function.
Steps to Use the Calculator:
- Launch the App: Open the HTML file in your browser.
- Input Numbers & Operations: Use the buttons to enter your arithmetic expression. For example, press
8,+,5. - Get the Result: Press the
=button to calculate and view the result. - Clear the Display: Use the Clear button to reset the calculator for a new operation.
This app supports:
- Addition (+)
- Subtraction (−)
- Multiplication (×)
- Division (÷)
- Decimal points (.)
Calculator App FAQ
Q1: What operations can this calculator perform?
A: Basic arithmetic—addition, subtraction, multiplication, and division.
Q2: What happens if I enter an invalid expression?
A: You’ll see an alert that says “Invalid expression,” and the calculator will reset.
Q3: Can I use a keyboard with this app?
A: Currently, no. It’s optimized for button input. But it can be extended to support keyboard input if desired.
Q4: Does it support parentheses or advanced math functions?
A: Not yet. This is a basic calculator. You’d need to integrate a math library or custom logic to support advanced operations.
Q5: Is this safe to use with complex expressions?
A: For simple calculations, yes. However, since it uses eval()It’s best not to modify or expose this code on untrusted websites without input sanitization.