A program asks the user to give a decimal number and then the program will convert the given decimal number into an octal equivalent using JavaScript programming language.
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index.htm
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Convert Decimal to Octal Using JavaScript</title>
<style>
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
background-color: #b1bfd8;
background-image: linear-gradient(315deg, #b1bfd8 0%, #6782b4 74%);
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
font-family: sans-serif;
}
form {
background: #ccc;
padding: 30px;
border-radius: 10px;
}
h1, h2 {
text-align: center;
}
h1 {
text-transform: uppercase;
margin-bottom: 5px;
font-size: 30px;
}
h2 {
margin-bottom: 20px;
color: #2196f3;
font-size: 20px;
font-weight: 400;
}
label,
input,
button {
display: block;
font-size: 14px;
outline: none;
}
label {
padding: 5px 0;
}
.btn-group {
display: flex;
}
input {
border: 1px solid #ccc;
border-right: none;
border-radius: 3px 0 0 3px;
width: 100%;
padding: 10px;
}
button {
padding: 10px 14px;
background-color: #4caf50;
border: none;
border-radius: 0 3px 3px 0;
color: #fefefe;
cursor: pointer;
}
.output {
margin-top: 10px;
background-color: #607d8b;
padding: 15px;
color: #fefefe;
text-align: center;
max-width: 330px;
word-wrap: break-word;
border-radius: 3px;
}
.hidden {
display: none;
}
</style>
</head>
<body>
<form action="" method="post">
<h1>Convert<br>Decimal to Octal<br>Using JavaScript</h1>
<h2>Jake R. Pomperada, MAED-IT, MIT</h2>
<label for="txtNumber">Enter a number to convert:</label>
<div class="btn-group">
<input type="number" name="txtNumber" id="txtNumber" autofocus required>
<button type="submit">Convert</button>
</div>
<div class="output hidden"></div>
</form>
<script>
document.querySelector('form').onsubmit = (e) => {
e.preventDefault()
let number = parseInt(document.querySelector('#txtNumber').value),
output = document.querySelector('.output')
result = number.toString(8)
output.classList.remove("hidden")
output.innerHTML = 'Octal Value: ' + result
}
</script>
</body>
</html>
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