Prime Number in PHP

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Q. Write a PHP program to check Prime Number or Not

<?php
// Define the number to check
$number = 29;
$isPrime = true;

// 0 and 1 are not prime
if ($number <= 1) {
    $isPrime = false;
} else {
    // Check divisibility from 2 to sqrt(number)
    for ($i = 2; $i <= sqrt($number); $i++) {
        if ($number % $i == 0) {
            $isPrime = false;
            break;
        }
    }
}

// Display the result
if ($isPrime) {
    echo "$number is a Prime Number.";
} else {
    echo "$number is NOT a Prime Number.";
}
?>
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Q. Write an algorithm to check Prime Number in PHP

1.Start
2.Define a number number
3. If number <= 1, set isPrime = false
4. Else loop from i = 2 to √number:
    a. If number % i == 0, set isPrime = false and break
5. If isPrime == true, print "Prime Number"
6. Else, print "Not a Prime Number"
7. End
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