A simple program that I wrote to ask the user to give a number and then the program will check if the given number is odd or even number using JavaScript programming language.
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Program Listing
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Odd and Even Number Checker in JavaScript </title>
<style type="text/css">
html {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
background: #fff;
color: #000;
height: 100%;
min-height: 100vh;
overflow-y: auto;
padding: 100px 0;
text-align: center;
font-family: sans-serif;
}
h1:nth-of-type(1) {
font-size: 35px;
line-height: 35px;
margin: 0 0 15px;
}
h2:nth-of-type(1) {
margin: 0 0 35px;
}
h2:nth-of-type(2) {
margin: 30px 0 20px;
text-transform: uppercase;
letter-spacing: 1px;
font-size: 30px;
}
a,
input[type="submit"] {
margin: 0 0 35px;
color: #fff;
text-decoration: none;
padding: 15px 20px;
border-radius: 10px;
min-width: 150px;
background: #3CBB9E;
display: inline-block;
text-transform: uppercase;
border: none;
outline: none;
font-size: 15px;
}
a:hover,
input[type="submit"]:hover {
opacity: 0.8;
color: #fff;
cursor: pointer;
}
a:nth-of-type(1) {
margin-right: 8px;
}
a:nth-of-type(2) {
margin-left: 8px;
}
table {
margin: 0 auto;
border-collapse: collapse;
border: 1px solid #000;
}
thead td {
text-transform: uppercase;
font-weight: 700;
background: #00334B;
color: #f2f2f2;
}
tbody tr {
background: #fff;
border-bottom: 1px solid #00334B;
color: #666666;
}
td {
padding: 20px;
}
table a,
table a:hover {
border-radius: 5px;
min-width: 80px !important;
padding: 10px !important;
margin: 0 !important;
}
table tr td:nth-child(4) a {
background: #2b86c5 !important;
}
table tr td:nth-child(5) a {
background: #784ba0 !important;
}
table tr td:nth-child(6) a {
background: #ff3cac !important;
}
p,
label,
input[type="text"] {
font-size: 15px;
margin-bottom: 10px;
}
p {
font-size: 20px;
}
label {
width: 200px;
display: inline-block;
padding: 15px 0;
background: #3CBB9E;
color: #fff;
border-top-left-radius: 30px;
border-bottom-left-radius: 30px;
text-transform: uppercase;
font-size: 15px;
}
input[type="number"] {
border: 0;
outline: none;
padding: 15px 20px;
width: 250px;
border-top-right-radius: 10px;
border-bottom-right-radius: 10px;
font-size: 15px;
background: #eaeaea;
}
form {
display: block;
width: 350px;
margin: 0 auto;
}
input[type="submit"] {
width: 100%;
font-size: 15px;
}
h1 {
text-transform: uppercase;
letter-spacing: 1px;
color: #f5f5f5;
background: #009688;
padding: 15px;
border-radius: 10px;
margin: 0;
line-height: 30px;
font-size: 35px;
}
</style>
</head>
<body>
<h1>Odd and Even Number Checker in JavaScript</h1>
<script>
function isEven() {
//get the input value
var num = document.getElementById('Val_Num').value;
if (num%2 == 0)
alert("The given number " + num + " is even number");
else
alert("The given number " + num + " is odd number");
}
function Clear_Text() {
document.getElementById('Val_Num').value ="";
document.getElementById('Val_Num').focus();
}
</script>
<form>
<label>Give a Number </label> <input type="number" id="Val_Num" name="Val_Num"/><br>
<br>
<input type="submit" onClick="isEven()" Value="Check" />
<input type="submit" onClick="Clear_Text()" Value="Clear" />
</form>
</p>
</body>
</html>
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