JavaScript and PHP Programs of Class 12



1. Write a program to JavaScript that illustrate event handling.

<html>
<head>
<title>qno1</title>
</head>
<body onload="alert('this is onload even')";>
<input type="button" value="onclickeventishere" onclick="onclickfun()" id="b1">
<input type="button" value="onmouseovereventishere" onmouseover="mover()" id="b2">
<input type="button" value="onmouseoutevenishere" onmouseout="mout()" id="b3">
<script>
function onclickfun() {
alert('this is onlicked event');
}
function mover() {
alert('this is mouse over event');
}
function mout() {
alert('this is mouseout event');
}
</script>
</body>
</html>



2. Write a JavaScript to display 1 to 10 using for loop, while loop, and do-while loop.

<script>
        let i=1;

// using for loop
         for(i=0; i<=10; i++){
            document.write(i+" ");
        }
        
        // using while loop
        while(i<=10){
            document.write(i+" ");
            i++;
        }

//using do-while loop
        do{
            document.write(i+" ");
            i++;
        }while(i<=10)

</script>

3. Write a JavaScript program to calculate the factorial of a given number.


<script>
 let fact = 1;
let i;
         let num = prompt("enter the number");
           num = parseInt(num);
         for(i=1; i<=num; i++){
         fact *=i;
         }
         document.write(fact);

</script>


4. Write a JavaScript program to input three numbers and find the largest one.

<script>

     let firstnum =parseInt(prompt("enter the 1st number"));
         let secondnum =parseInt(prompt("enter the 2nd number"));
        let thirdnum =parseInt(prompt("enter the 3th number"));
        if(firstnum >secondnum && firstnum>thirdnum){
            document.write(firstnum + " this is the largest number");
        }else if(secondnum > thirdnum){
            document.write(secondnum + " is the largest number");
        }else{
            document.write(thirdnum + " is the largest number");
        }

</script>

5. Write a program to input any three numbers and find the average in JavaScript.

<script>
let firstnum =parseInt(prompt("enter the 1st number"));
         let secondnum = parseInt(prompt("enter the 2nd number"));
         let thirdnum = parseInt(prompt("enter the 3rd number"));
        
        let avg = (firstnum * secondnum * thirdnum)/3;
        document.write("the average number is "+ avg);
</script>

6. Write a program to find area and circumferences of circle in JavaScript.

<script>
           let x = parseInt(prompt("Enter radius"));
           let  y = x*x*22/7;
           let cr = 2*x*22/7;
           document.write("area of circle is "+y);
           document.write("<br>circumference  of circle is "+cr);
 </script>

7. Write a program to display all even number from 1 to 100 in JavaScript.

<script>
let num=1;
         while(num<=100){
          if(num%2==0){
                 document.write(num +" ");
             }
                num++;
         }
 </script>

8. Write a program to sum of two number using function.

<script>
function sum(x, y){
             let z=x+y;
             document.write(z);
         }
         let num1 = parseInt(prompt("Enter the 1st Number"));
        let num2 = parseInt(prompt("enter the 2nd number"));
         sum(num1, num2);
</script>

9. Write a program to input any number and find its reverse order in JavaScript.

<!DOCTYPE html>
<html>
<head>
    <title>Reverse Number</title>
</head>
<body>
    <input id="num">
    <button onclick="reverseNumber()">Enter</button>

    <script>
        function reverseNumber() {
            let num = document.getElementById("num").value;
            let reversedNumber = parseInt(num.toString().split('').reverse().join(''));
            document.write("Reversed number: " + reversedNumber); 
        }
    </script>
</body>
</html>


10. Write a program to display the Fibonacci series. 1 1 2 3 5 8 13 ……n in JavaScript. 

<script>
    let n,a=0,b=1,c,i;
    n = parseInt(prompt("Enter the number"));
    for(i=1;i<=n;i++){
        document.write(a+" ");
        c=a+b;
        a=b;
        b=c;
    }
    </script>

11. Design a form with username, address, e-mail, password, and submit button.

Validated the form using JavaScript.

<html>
<html>
<head>
    <title>Form Validation</title>
    <script>
        function validateForm() {
            var username = document.getElementById("username").value;
            var address = document.getElementById("address").value;
            var email = document.getElementById("email").value;
            var password = document.getElementById("password").value;

            if (username.trim() === "") {
                alert("Please enter your username.");
                return false;
            }
            if (address.trim() === "") {
                alert("Please enter your address.");
                return false;
            }
            if (email.trim() === "") {
                alert("Please enter your email.");
                return false;
            }
            var emailRegex = /^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$/;
            if (!emailRegex.test(email)) {
                alert("Please enter a valid email address.");
                return false;
            }
            if (password.trim() === "") {
                alert("Please enter your password.");
                return false;
            }
            if (password.length < 6) {
                alert("Password must be at least 6 characters long.");
                return false;
            }

            return true;
        }
    </script>
</head>
<body>

<h2>Form Validation</h2>
<form onsubmit="return validateForm()">
    <label for="username">Username:</label><br>
    <input type="text" id="username" name="username"><br>

    <label for="address">Address:</label><br>
    <input type="text" id="address" name="address"><br>

    <label for="email">Email:</label><br>
    <input type="email" id="email" name="email"><br>

    <label for="password">Password:</label><br>
    <input type="password" id="password" name="password"><br>

    <input type="submit" value="Submit">
</form>

</body>
</html>



13. Write a PHP program to check if a string is a palindrome or not.


<?php

function isPalindrome($str) {
    $cleanedStr = strtolower(preg_replace("/[^A-Za-z0-9]/", "", $str));
    
    $reversedStr = strrev($cleanedStr);
    
    if ($cleanedStr === $reversedStr) {
        return true;
    } else {
        return false;
    }
}

$inputString = "A man, a plan, a canal, Panama";
if (isPalindrome($inputString)) {
    echo "The string \"$inputString\" is a palindrome.";
} else {
    echo "The string \"$inputString\" is not a palindrome.";
}

?>


14. Write a PHP code to enter any two number and display their sum, difference and  

product.

<html>
<body>
<form method="post">
<input type="number" name="lenght">
<input type="number" name="breadth">
<input type="submit" name="area" value="area">
<input type="submit" name="perimeter" value="perimeter">
</form>
<?php
if(isset($_POST['area'])){
$l=$_POST['lenght'];
$b=$_POST['breadth'];
$a=$l*$b;
echo 'area is '.$a;
}
if(isset($_POST['perimeter'])){
$l=$_POST['lenght'];
$b=$_POST['breadth'];
$r=2*$l+2*$b;
echo 'perimeter is '.$r;
}
?>
</body>
</html>



15. Write a PHP code to find out area and perimeter of rectangle.

<?php

$length = 10; 
$width = 5;   
$area = $length * $width;
$perimeter = 2 * ($length + $width);

echo "Length of the rectangle: $length <br>";
echo "Width of the rectangle: $width <br>";
echo "Area of the rectangle: $area <br>";
echo "Perimeter of the rectangle: $perimeter <br>";

?>

16. Create a registration form including Name, Address, Phone No., email address,

Qualification, Gender and Country and get the values entered by user using post

method and display.

<html>
<body>
<form method="post">
Enter name:<input type="text" name="name">
Enter address:<input type="text" name="address">
Enter number:<input type="number" name="phone">
Enter email:<input type="text" name="email">
Enter qualification:<input type="text" name="qualification">
Enter gender:<input type="text" name="gender">
Enter countryname:<input type="text" name="country">
<input type="submit" name="submit" value="submit">
</form>
<?php
if(isset($_POST['submit'])){
$n=$_POST['name'];
$a=$_POST['address'];
$p=$_POST['phone'];
$e=$_POST['email'];
$q=$_POST['qualification'];
$g=$_POST['gender'];
$c=$_POST['country'];
echo 'name is ',$n,' address is ',$a,' phone is ',$p,' email is ',$e,' qualification is ',$q,' gender is '.$g.' country is ',$c;
} 
?>
</body>
</html>


17. Write a program in PHP to display all the even numbers from 1 to 100.

<?php

for ($i = 1; $i <= 100; $i++) {
    
    if ($i % 2 == 0) {
        echo $i . " ";
    }
}

?>


18. Write a program in PHP to input a number and check it is odd and even.

<html>
<body>
<form method="post">
<input type="number" name="num">
<input type="submit" name="submit" value="check">
</form>
<?php
if (isset($_POST['submit'])) {
    $n=$_POST['num'];
    for($i=1;$i<=10;$i++){
        $num=$i*$n;
        echo $num.' ';
    }
}
?>
</body>
</html>


19. Write a program in PHP to display the multiplication table of a number.


<html>
    <body>
        <form method="post">
            <input type="number" name="num1">
            <input type="submit" name="submit" value="find factorial">
</form>
<?php
if(isset($_POST['submit'])){
    $n=$_POST['num1'];
    $fac=1;
    for($i=1;$i<$n;$i++){
        $fac=$i*$fac+$fac;
    }
    echo 'the factorial is '.$fac;
}
?>
</form>
</body>
    </html>




20. Write a program in PHP to input a number and find its Armstrong or not.

<html>
    <body>
        <form method="post">
            <input method="number" name="num1">
            <input type="submit" name="submit" value="check">
</form>
<?php
if(isset($_POST['submit'])){
    $n=$_POST['num1'];
    $mul=0;
    $arm=$_POST['num1'];
    while($n>0){
        $rem=$n%10;
        $mul=$mul+$rem*$rem*$rem;
        $n=$n/10;
    }
    if($mul==$arm){
        echo 'its armstrong';
    }else{
        echo 'its not armstrong';
    }
}
?>
</body>
        </html>

21.  Write a program in PHP to find the factors of an input a number.

<html>
    <body>
        <form method="post">
            <input type="number" name="num1">
            <input type="submit" name="submit" value="find factors">
</form>
<?php
if(isset($_POST['submit'])){
    $n=$_POST['num1'];
    for($i=1;$i<=$n;$i++){
        if($n%$i==0){
            echo $i.' ';
        }
    }
}
?>
</form>
</body>
    </html>

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