Example: Print Prime Numbers from 1 to 100 in PHP using While loop

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PHP

<?php
// Print Prime Numbers from 1 to 100 in PHP using While loop

$x = 60;
echo "------The prime numbers from 1 to ".$x." are------\n\n";

$i = 0;
while ($i < $x) {
    
    // There are niether prime nor composite if as skip 0 and 1 number
    if ($i == 1 || $i == 0) {
        $i++;
        continue;
    }
    
    $f = 1;
    
    $j = 2;
    while ($j < intval($i / 2) + 1) {
        if ($i % $j == 0) {
            $f = 0;
            break;
        }
        $j++;
    }
    
    // If f = 1 means i is prime number and f = 0 means i is not prime number
    if ($f == 1)
        echo $i." ";

    $i++;
}
echo "\n";

?>