PHP program to check whether the given number is palindrome or not

This PHP program is very useful for IT freshers.

Most of the IT companies ask this program in technical interview.




PHP program to check whether the given number is palindrome or not.

<?php
// PHP program to check whether the given number is palindrome or not
$n=123;
$rev=0;
$n1=$n;
while((int)$n > 0){
$rem = $n % 10;
$rev = ($rev*10) + $rem;
$n = (int)$n / 10;
}
echo "Reverse of $n1 = ".$rev."<br/>";
if($n1 == $rev){
echo "$n1 is palindrom number";
}else{
echo "$n1 is not palindrom number";
}
?>

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PHP program to check whether the given number is prime or not

This post is very important for IT Students and IT freshers.

The most important program asked in various interviews or technical tests:
Write a PHP program to check whether the given number is prime or not.




What is Prime number: the number which is divisible by 1 and itself only.


So, here is the Program to check whether the given number is prime or not.

<?php
// What is Prime number: the number which is divisible by 1 and itself only.
$n=6; // The number which we want to check if it is PRIME or NOT PRIME
$prime=true;
for($i=2;$i<$n;$i++){
if($n%$i == 0){
$prime = false; // If Number is divisible by the $i iteration, it is not prime
break;
}
}
if($prime){
echo "PRIME";
}else{
echo "NOT PRIME";
}

?>

Output:
NOT PRIME

// when we assign value to n is 5 then output will be PRIME
--------------------------------------------------------------------------------------------




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