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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Calculator App</title>
<link rel="stylesheet" type="text/css" href="main.css" />
<script>
function doAdd() {
let sum;
let input1;
let input2;
input1 = document.getElementById("box1").value;
document.getElementById("box1").value = input1;
console.log(input1);
input1 = Number(input1);
input2 = document.getElementById("box2").value;
document.getElementById("box2").value = input2;
console.log(input2);
input2 = Number(input2);
sum = input1 + input2;
console.log(sum);
document.getElementById("box3").value = sum;
if (sum < 0) {
document.getElementById("box3").style.color = "red";
} else {
document.getElementById("box3").style.color = "darkblue";
}
}
function doSubtract() {
let difference;
let input1;
let input2;
input1 = document.getElementById("box1").value;
document.getElementById("box1").value = input1;
console.log(input1);
input1 = Number(input1);
input2 = document.getElementById("box2").value;
document.getElementById("box2").value = input2;
console.log(input2);
input2 = Number(input2);
difference = input1 - input2;
console.log(difference);
document.getElementById("box3").value = difference;
if (difference < 0) {
document.getElementById("box3").style.color = "red";
} else {
document.getElementById("box3").style.color = "darkblue";
}
}
function doMultiply() {
let multiplication;
let input1;
let input2;
input1 = document.getElementById("box1").value;
document.getElementById("box1").value = input1;
console.log(input1);
input1 = Number(input1);
input2 = document.getElementById("box2").value;
document.getElementById("box2").value = input2;
console.log(input2);
input2 = Number(input2);
multiplication = input1 * input2;
console.log(multiplication);
document.getElementById("box3").value = multiplication;
if (multiplication < 0) {
document.getElementById("box3").style.color = "red";
} else {
document.getElementById("box3").style.color = "darkblue";
}
}
function doDivide() {
let division;
let input1;
let input2;
input1 = document.getElementById("box1").value;
document.getElementById("box1").value = input1;
console.log(input1);
input1 = Number(input1);
input2 = document.getElementById("box2").value;
document.getElementById("box2").value = input2;
console.log(input2);
input2 = Number(input2);
division = input1 / input2;
console.log(division);
document.getElementById("box3").value = division;
if (division < 0) {
document.getElementById("box3").style.color = "red";
} else {
document.getElementById("box3").style.color = "darkblue";
}
}
function doPower() {
let total;
let number;
let power;
number = document.getElementById("box1").value;
document.getElementById("box1").value = number;
console.log(number);
number = Number(number);
power = document.getElementById("box2").value;
document.getElementById("box2").value = power;
console.log(power);
power = Number(power);
total = 1;
for (let i = 1; i <= power; i++) {
total = total * number;
}
console.log(power);
document.getElementById("box3").value = total;
if (total < 0) {
document.getElementById("box3").style.color = "red";
} else {
document.getElementById("box3").style.color = "darkblue";
}
}
function doClear() {
document.getElementById("box1").value = "";
document.getElementById("box2").value = "";
document.getElementById("box3").value = "";
}
</script>
</head>
<body>
<div id="container">
<h1>CALCULATOR</h1>
<input type="text" id="box1" class="boxes" />
<input type="text" id="box2" class="boxes" />
<br />
<button type="button" onclick="doAdd()" class="center">+</button>
<button type="button" onclick="doSubtract()" class="center">-</button>
<button type="button" onclick="doMultiply()" class="center">*</button>
<button type="button" onclick="doDivide()" class="center">/</button>
<button type="button" onclick="doPower()" class="center">^</button>
<br />
<input type="text" id="box3" class="boxes" />
<br />
<button type="button" onclick="doClear()" class="center" id="clear">
Clear
</button>
</div>
</body>
</html>