Write a PHP program to print prime number

Here we are write a program to find number is prime or not of a given number, Prime number which is only divisible by 1 and itself. Example of Prime Numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23 etc.
Prime number greater than 1 means 0 and 1 is not a prime number.

PHP Program to print prime numbers

Here we are printing first 20 prime numbers.

<?php 
$count = 0;
$num = 2;
while ($count < 20 )
{
 $div_count=0;
 for ( $i=1; $i<=$num; $i++)
 {
 if (($num%$i)==0)
 {
 $div_count++;
 }
 }
 if ($div_count<3)
 {
 echo $num." , ";
 $count=$count+1; 
 }
 $num=$num+1;
}
?>

PHP Program of number is prime or not using HTML Form

<div class="formdiv">
<form method="post">
<input type="text" name="number" placeholder="Enter number" />
<input type="submit" value="Submit" />
</form>
</div>

<?php
if(isset($_POST['number']))
{
$num = $_POST['number'];
for ($i = 2; $i <= $num-1; $i++)
{
if ($num % $i == 0)
{
$value= True;
}
}
if($num<2)
{
echo 'The Number '. $num . ' is not prime';
}
else if (isset($value) && $value)
{
echo 'The Number '. $num . ' is not prime';
}
else{
echo 'The Number '. $num . ' is prime';
}
}
?>

Leave a Reply

Related Posts: You may like

Find Armstrong Number

Write a program find Factorial of a number

Write a PHP program to Print table of Number

Write a PHP program to print number is Even or Odd

PHPKIDA Offering Free Tools:

INSTA DOWNLOADER

Download Instagram Videos & Photos.

Download Now

CURRENCY CONVERTER

Real Time Currency Converter

Convert Now

ROBOST.TXT GEN.

Robots.txt File Creater

Create Now

HTML MINIFIER

Compress yout HTML Code

Minify Now

CSS MINIFIER

Compress yout CSS Code

Minify Now

JAVASCRIPT MINIFIER

Compress yout JavaScript Code

Minify Now

Sign up for weekly update

Milkshake is almost ready. If you're interested in testing it out, then sign up below to get exclusive access.