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| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Basic Calculator</title> | |
| <style> | |
| /* Parent Container */ | |
| .parent { | |
| display: flex; | |
| justify-content: center; /* Center horizontally */ | |
| align-items: center; /* Center vertically */ | |
| height: 100vh; /* Full height of the screen */ | |
| background-color: lightgray; | |
| } | |
| /* Child Box */ | |
| .container { | |
| width: 300px; | |
| height: 450px; | |
| border: 5px solid black; /* Border */ | |
| background-color: white; | |
| border-radius: 10px; /* Optional */ | |
| } | |
| .txt { | |
| margin: 10px; | |
| width: 270px; | |
| height: 50px; | |
| font-size: 40px; | |
| text-align: right; | |
| border: 5px solid rgb(28, 27, 27); | |
| } | |
| .box { | |
| width: 50px; | |
| height: 50px; | |
| margin: 10px; | |
| font-size: 30px; | |
| border: 5px ridge rgb(28, 27, 27); | |
| border-radius: 5px; | |
| } | |
| #op { | |
| background-color: #e7ef0e; | |
| } | |
| #op:hover { | |
| background-color: aliceblue; | |
| } | |
| h1 { | |
| text-align: center; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <!-- Parent Div (for positioning) --> | |
| <div class="parent"> | |
| <!-- Child Div (the actual content box) --> | |
| <div class="container"> | |
| <h1> Basic Calculator </h1> | |
| <input type="text" class="txt" id="display" readonly> | |
| <button class="box">7</button> | |
| <button class="box">8</button> | |
| <button class="box">9</button> | |
| <button class="box" id="op">X</button> | |
| <button class="box">4</button> | |
| <button class="box">5</button> | |
| <button class="box">6</button> | |
| <button class="box" id="op">-</button> | |
| <button class="box">1</button> | |
| <button class="box">2</button> | |
| <button class="box">3</button> | |
| <button class="box" id="op">+</button> | |
| <button class="box">0</button> | |
| <button class="box" id="op">C</button> | |
| <button class="box" id="op" >/</button> | |
| <button class="box" id="op">=</button> | |
| </div> | |
| </div> | |
| <script language="javascript"> | |
| var buttons = document.getElementsByClassName("box"); | |
| var display = document.getElementById("display"); | |
| var currentInput = ""; | |
| function buttonClick() { | |
| var value = this.innerText; | |
| if (value === "=") { | |
| try { | |
| currentInput = eval(currentInput.replace("X", "*")); | |
| display.value = currentInput; | |
| } catch (e) { | |
| display.value = "Error"; | |
| } | |
| } else if ((value === "C")) { | |
| currentInput = ""; | |
| display.value = currentInput; | |
| } | |
| else { | |
| currentInput += value; | |
| display.value = currentInput; | |
| } | |
| } | |
| for (var i = 0; i < buttons.length; i++) { | |
| buttons[i].addEventListener("click", buttonClick); | |
| } | |
| </script> | |
| </body> | |
| </html> | |