<head>
<title>Pengurangan 2 Variabel</title>
<style>
.box {
width: 40%;
border-radius: 5px;
border: 1px solid #9b9b9b;
padding: 20px 0px 20px 0px;
margin-left: 30%;
}
.h2{
font-family: calibri;
font-weight: lighter;
letter-spacing: 3px;
}
#bil1{
padding: 5px;
}
#bil2{
padding: 5px;
}
#hasil{
color: #ff0b0b;
}
</style>
</head>
<body>
<div class="box">
<center>
<h2 class="h2">
Aplikasi Pengurangan 2 bilangan</h2>
<div class="box1">
<label>Bil 1</label>
<input id="bil1" placeholder="Masukan bilangan 1" type="text" />
</div>
<br />
<div class="box2">
<label>Bil 2</label>
<input id="bil2" placeholder="Masukan bilangan 2" type="text" />
</div>
<div class="box3">
<label>Hasil</label>
<label id="hasil"></label>
</div>
<br />
<input class="btn" id="btn" onclick="jumlah()" type="button" value="Jumlah" />
</center>
</div>
<script>
function jumlah(){
var a = document.getElementById("bil1").value;
var b = document.getElementById("bil2").value;
document.getElementById("hasil").innerHTML = parseFloat(a) - parseFloat(b);
}
</script>
</body>
</html>
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