How to check whether a number is Prime or not?
BY Best Interview Question ON 26 Jan 2019
Example
function IsPrime($n) {
for($x=2; $x<$n; $x++)
{
if($n %$x ==0) {
return 0;
}
}
return 1;
}
$a = IsPrime(3);
if ($a==0)
echo 'Its not Prime Number.....'."\n";
else
echo 'It is Prime Number..'."\n";