html
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<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
</head>
<body>
<div align="center">
<h1>Simple Adder and Subtractor</h1>
<button onclick="Add()">Add 1</button>
<button onclick="Subtract()">Subtract 1</button>
<button onclick="Multiply()">Multiply</button>
<button onclick="Divide()">Divide</button>
</div>
<hr>
<label>Number of Clicks:</label>
<span id="output">0</span>
<hr>
<button onclick="Clear()">Clear</button>
<br/>
<br/>
</html>
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css
css
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body {
background-color: #a8eea8;
}
span {
background-color: grey;
border-radius:15px;
}
button {
background-color: #4CAF50;
color: white;
padding: 16px;
font-size: 16px;
border: none;
cursor:pointer;
}
button:hover {
background-color: #3e8e41;
}
button:active {
background-color: red;
}
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js
js
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var i = 0;
function Add() {
document.getElementById("output").innerHTML = ++i;
}
function Subtract() {
document.getElementById("output").innerHTML = --i;
}
function Clear() {
while(i < 0) {
++i;
}
while(i > 0) {
--i;
}
document.getElementById("output").innerHTML = "0";
}
function Multiply() {
var p = prompt("Enter Number:"); document.getElementById("output").innerHTML = i*p;
i =i*p;
}
function Divide() {
var p = prompt("Enter Number:"); document.getElementById("output").innerHTML = i/p;
i =i/p;
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