Write how to make a calculator using java program
here are the steps on how to make a calculator using HTML:
Create the basic structure of the calculator. This includes the following elements:
- A result box where the calculation results will be displayed.
- Buttons for performing mathematical operations.
- Text fields for entering numbers.
Create a CSS style sheet to style the calculator. This includes the following styles:
- The result box should be centered and have a border.
- The buttons should be large and have a white background and black text.
- The text fields should be small and have a black border.
Create the JavaScript code to calculate the inputs and display the results. This code includes the following functions:
clearScreen(): Clears the result box.display(): Displays a value in the result box.calculate(): Performs a mathematical operation on the values in the text fields and displays the result in the result box.
Here is an example of the HTML, CSS, and JavaScript code for a simple calculator:
HTML
<!DOCTYPE html><html><head><title>Calculator</title><style>body { font-family: sans-serif;}
.calculator { width: 300px; margin: 0 auto;}
.result-box { width: 100%; height: 50px; border: 1px solid black; text-align: center;}
.button { width: 50px; height: 50px; background-color: white; color: black; border: none; cursor: pointer;}
.text-field { width: 100px; height: 25px; border: 1px solid black;}</style></head><body><div class="calculator"> <div class="result-box"> <input type="text" id="result" value="0" readonly /> </div> <div class="buttons"> <button id="clear">Clear</button> <button id="plus">+</button> <button id="minus">-</button> <button id="multiply">*</button> <button id="divide">/</button> <input type="text" id="first-number" /> <input type="text" id="second-number" /> </div></div><script>function clearScreen() { document.getElementById("result").value = "";}
function display(value) { document.getElementById("result").value += value;}
function calculate() { var firstNumber = document.getElementById("first-number").value; var secondNumber = document.getElementById("second-number").value; var operator = document.getElementById("operator").value;
var result = eval(firstNumber + operator + secondNumber);
document.getElementById("result").value = result;}
document.getElementById("clear").onclick = clearScreen;document.getElementById("plus").onclick = function() { display("+");};document.getElementById("minus").onclick = function() { display("-");};document.getElementById("multiply").onclick = function() { display("*");};document.getElementById("divide").onclick = function() { display("/");};document.getElementById("calculate").onclick = calculate;</script></body></html>This is just a basic example of how to make a calculator using HTML, CSS, and JavaScript. You can customize the code to add more features and functionality to your calculator.
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