How to find a number is prime or composite

Question

in PHP

Answer 1

/*
isPrime(p){
if (p<=1) return false;
for (a = 2; a <= p/2; a++) {
if (p % a == 0){
return false;
break;
}
}
return true;
}
*/

if (p!=1&&!isPrime (p)) System.out.print(composite);

Answer 2

thanks@toni

Answer 3

For prime numbers

function isPrime($p){
for ($a = 2; $a <= $p/2; $a++) {
if ($p % $a == 0){
return false;
}
}
return true;
}

Answer 4

You can check this https://code.sololearn.com/wtRgMCG7xbxb/#php