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Code to find the factorial of a number
<!DOCTYPE html>
<html>
<head>
</head>
<body style = "text-align: center; font-size: 20px;">
<h1> Welcome to the javaScript world!! </h1>
Enter a particular number: <input id = "num">
<br><br>
<button onclick = "fact()"> Please type any Factorial number </button>
<p id = "res"></p>
<script>
function fact(){
var i, num, f;
f = 1;
num = document.getElementById("num").value;
for(i = 1; i <= num; i++)
{
f = f * i;
}
i = i - 1;
document.getElementById("res").innerHTML = "The factorial of the number " + i + " is: " + f ;
}
</script>
</body>
</html>
Code to run a javaScript timer
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Timing Sample</h2>
<p>Click on "Try it". Wait 5 seconds, and the page will alert "Hello How are you!!".</p>
<button onclick="setTimeout(myFunction, 5000);">Try it</button>
<script>
function myFunction() {
alert('Hello How are you!!');
}
</script>
</body>
</html>
OUTPUT:
Hello How are you!!
Code to convert number to string
<!DOCTYPE html>
<html>
<body>
<h2>HTML JS OUTPUT</h2>
<p>1st Paragraph.</p>
<p id="HTMLJSOUTPUT"></p>
<script>
document.getElementById("HTMLJSOUTPUT").innerHTML = 7 + 7;
</script>
</body>
</html>
Output:
​
HTML JS OUTPUT
​
1st Paragraph
​
14
Code to prompt for a message
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Prompt Example</h2>
<button onclick="myFunction()">Please Try for Prompt message</button>
<p id="Prompt Example"></p>
<script>
function myFunction() {
let text;
let user = prompt("Please enter your name:", "Your First Name");
if (user == null || user == "") {
text = "User cancelled the prompt.";
} else {
text = "Hello " + person + "! How are you?";
}
document.getElementById("Prompt Example").innerHTML = text;
}
</script>
</body>
</html>
​​
​
OUTPUT:
Please Enter Your Name:
​
​ Your First Name
​