Calculators are one of the most commonly used tools in our daily lives. Whether we are solving a math problem, balancing our checkbook, or trying to figure out how much paint to buy for our walls, calculators help us do the job quickly and easily.
HTML is the code that helps us create websites. It is a very powerful tool that gives us a lot of control over how our website looks and behaves. In this tutorial, we will learn how to use HTML to create a simple calculator.
First, we need to create a file called “calculator.html” and open it in our favorite text editor. We will start by adding some basic HTML markup to our file:
Next, we need to add some CSS style rules to make our calculator look better. We will use the following CSS code:
Now that our calculator looks better, let’s add some functionality to it. We will start by adding two text boxes where the user can input numbers. We will also add four buttons for the four basic arithmetic operations: addition, subtraction, multiplication, and division.
We will use the following HTML code for our text boxes and buttons:
Now let’s add some JavaScript code to make our calculator actually do something when the user clicks on one of the buttons. We will start by getting the values from the two text boxes and storing them in variables:
var num1 = document.getElementById(“num1”).value; var num2 = document.getElementById(“num2”).value;
Next, we will write a function that performs the appropriate arithmetic operation when one of the buttons is clicked:
function calculate(operation) { if (operation == “+”) { alert(num1 + num2); } else if (operation == “-“) { alert(num1 – num2); } else if (operation == “*”) { alert(num1 * num2); } else if (operation == “/”) { alert(num1 / num2); } }
