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<?php
// PHP code to check whether a number is prime or Not
// function to check the number is Prime or Not
function primeCheck($number){
if ($number == 1)
return 0;
for ($i = 2; $i <= $number/2; $i++){
if ($number % $i == 0)
return 0;
}
return 1;
}
// Driver Code
$number = 31;
$flag = primeCheck($number);
if ($flag == 1)
echo "Prime";
else
echo "Not Prime"
?>