Create Your Own Calculator with JavaScript

Styling the HTML

Now that we have our HTML in place, we can start styling it. We will be using CSS to style our calculator. We will be using the following CSS to style our calculator:

#display {
width: 100%;
height: 50px;
font-size: 20px;
text-align: right;
background-color: #ccc;
border: 1px solid #000;
padding: 10px;
}

input[type=”button”] {
width: 50px;
height: 50px;
font-size: 20px;
background-color: #ccc;
border: 1px solid #000;
margin: 5px;
}

Adding the JavaScript

Now that we have our HTML and CSS in place, we can start adding the JavaScript. We will be using JavaScript to create the calculator logic. We will be using the following JavaScript to create our calculator:

// Add a number to the display
function addNumber(num) {
document.getElementById(‘display’).value += num;
}

// Add an operator to the display
function addOperator(op) {
document.getElementById(‘display’).value += op;
}

// Clear the display
function clearDisplay() {
document.getElementById(‘display’).value = ”;
}

// Calculate the result
function calculate() {
let result = eval(document.getElementById(‘display’).value);
document.getElementById(‘display’).value = result;
}

Testing the Calculator

Now that we have our HTML, CSS, and JavaScript in place, we can test our calculator. Open the HTML file in your web browser and try entering some numbers and operators. You should see the numbers and operators appear in the display. When you press the “=” button, the result should be displayed in the display.

Conclusion

In this tutorial, we have created a calculator using HTML, CSS, and JavaScript. We have used HTML to create the user interface, CSS to style the user interface, and JavaScript to create the calculator logic. By the end of this tutorial, you should have a fully functional calculator that you can use to perform basic calculations.

FAQs

Q: How do I use the calculator?
A: To use the calculator, simply enter the numbers and operators into the display and press the “=” button to calculate the result.

Q: Can I use the calculator to perform more complex calculations?
A: Yes, the calculator can be used to perform more complex calculations. However, it is limited to basic arithmetic operations.

Q: Can I customize the calculator?
A: Yes, you can customize the calculator by changing the HTML, CSS, and JavaScript code.

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