A basic calculator is able to perform basic operations like addition, subtraction, multiplication and division. This type of calculator contains at least ten numeric digits button, four buttons for addition, multiplication, subtraction and division. One button for "equal to" sign and one button for "clear screen". The calculator can be designed using various coding languages but here we will use HTML, CSS and JAVASCRIPT to design a simple calculator which will perform basic operations like addition, multiplication, subtraction and division. Explore the following code.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Basic Calculator</title>
<style>
input[type="button"] {
width: 100%;
height: 60px;
font-size: 25px;
background:green;
color:white;
font-weight:800;
border-radius:18px;
border:1px solid black;
}
#result{
font-size:25px;
font-weight:800;
height:40px;
background:grey;
color:#fff;
width:97%
}
</style>
</head>
<body>
<div style="padding:10px;border:3px solid black; border-radius:16px; background:#c0c0c0;">
<table border="1" style="background:black;width:100%;border-collapse:collapse;">
<tr>
<td colspan="4">
<input type="text" id="result" readonly>
</td>
</tr>
<tr>
<td><input type="button" value="1" onclick="addToResult('1')"></td>
<td><input type="button" value="2" onclick="addToResult('2')"></td>
<td><input type="button" value="3" onclick="addToResult('3')"></td>
<td><input type="button" value="+" onclick="addToResult('+')"></td>
</tr>
<tr>
<td><input type="button" value="4" onclick="addToResult('4')"></td>
<td><input type="button" value="5" onclick="addToResult('5')"></td>
<td><input type="button" value="6" onclick="addToResult('6')"></td>
<td><input type="button" value="-" onclick="addToResult('-')"></td>
</tr>
<tr>
<td><input type="button" value="7" onclick="addToResult('7')"></td>
<td><input type="button" value="8" onclick="addToResult('8')"></td>
<td><input type="button" value="9" onclick="addToResult('9')"></td>
<td><input type="button" value="*" onclick="addToResult('*')"></td>
</tr>
<tr>
<td><input type="button" value="C" onclick="clearResult()"></td>
<td><input type="button" value="0" onclick="addToResult('0')"></td>
<td><input type="button" value="=" onclick="calculateResult()"></td>
<td><input type="button" value="/" onclick="addToResult('/')"></td>
</tr>
</table>
<script>
function addToResult(value) {
document.getElementById('result').value += value;
}
function clearResult() {
document.getElementById('result').value = '';
}
function calculateResult() {
var result = eval(document.getElementById('result').value);
document.getElementById('result').value = result;
}
</script>
</div>
</body>
</html>
A simple mathematical calculator is a device or application designed to perform basic arithmetic operations like addition, subtraction, multiplication, and division. It usually has a user-friendly interface with buttons for numbers and symbols, as well as a display screen to show the input and output. These calculators are handy for quick calculations and are often used in everyday situations.
Designing a simple mathematical calculator for a website involves creating a user interface with buttons for numbers and mathematical operations, along with a display area to show the input and output. Here's a basic outline of the steps:
1. HTML Structure: Create the structure of the calculator using HTML. Use `<div>` elements for different sections like display area, number buttons, and operation buttons.
2. CSS Styling: Style the calculator using CSS to make it visually appealing and user-friendly. Use colors, fonts, and layout to make it easy to understand and interact with.
3. JavaScript Functionality: Add JavaScript to handle the calculator's functionality. Write functions to handle button clicks, perform arithmetic operations, update the display, and handle user input.
4. Event Handling: Use event listeners to detect button clicks and trigger the appropriate actions. For example, when a number button is clicked, append the corresponding number to the input display.
5. Arithmetic Operations: Implement functions to handle addition, subtraction, multiplication, and division based on user input. Update the display with the result of the operation.
6. Error Handling: Include error handling to handle cases such as division by zero or invalid input. Display meaningful error messages to the user.
7. Responsive Design: Ensure that the calculator is responsive and works well on different screen sizes and devices. Test the calculator on various browsers and devices to ensure compatibility.
8. Testing and Debugging: Test the calculator thoroughly to identify and fix any bugs or issues. Debug JavaScript code to ensure proper functionality.
9. Accessibility: Make the calculator accessible by ensuring that it can be used with keyboard navigation and screen readers. Add appropriate ARIA attributes for accessibility.
10. Documentation: Provide clear instructions or documentation on how to use the calculator on the website. Explain the functionality and features to users.
By following these steps, you can design a simple mathematical calculator for a website that is easy to use and provides basic arithmetic functionality.
Use CSS to make it more stylish
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