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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="css/style.css">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Simple Calculator</title>
<link rel="shortcut icon" href="images/Calculator_5122x.png" type="image/x-icon">
</head>
<body>
<div class="padwidht">
<h4 style="color:white;" align="center">KALKULATOR<span style="color: #00ff00;">+</span><span style="color: #800080;">-</span><span style="color: #ff0000;">X<span style="color: #0000ff;">/</span></span></h4>
<input type="text" id="angkaPertama">
<select id="operator">
<option value="+">+</option>
<option value="-">-</option>
<option value="x">x</option>
<option value="/">+</option>
</select>
<input type="text" id="angkaKedua">
<input type="submit" onclick="kalkulator()" value="=">
<input type="text" id="hasil" disabled>
<script language="javaScript" type="text/javascript">
function kalkulator() {
var angkaPertama = parseInt(document.getElementById("angkaPertama").value);
console.log("angkaPertama adalah " + angkaPertama);
var angkaKedua = parseInt(document.getElementById("angkaKedua").value);
console.log("angkaKedua adalah " + angkaKedua);
var op = document.getElementById("operator").value;
var hasil = document.getElementById("hasil");
var total;
if (isNaN(angkaPertama) || isNaN(angkaKedua)) { alert("isi form dengan angka"); }
else {
switch (op) {
case "+":
total = angkaPertama + angkaKedua;
break;
case "-":
total = angkaPertama - angkaKedua;
break;
case "x":
total = angkaPertama * angkaKedua;
break;
case "/":
total = angkaPertama / angkaKedua;
break;
default:
alert("Tidak ada operator " + op);
}
}
hasil.value = total;
}
</script>
<br />
<br />
</div>
</body>
</html>