Number Theory | Find all primes for 1-100.

Definition of prime number:

In a natural number greater than 1, the number that cannot be divisible by other natural numbers except for 1 and the integer itself.

1 and 0 are neither prime nor composite. Prime numbers are two concepts relative to composite number, which constitute one of the most basic definitions in number theory.

<?php
define (' MAX ');


for ($n = 2; $n < MAX; $n + +) {
	if ($prime = Prime ($n)) {
		var_dump ($prime);
	}
	else {
		continue;
	}
}
Function Prime ($n) {for
	($i = 2; $i <= ceil (sqrt ($n); $i + +) {
		if ($n% $i)!= 0) {
			if ($i < ceil (sqrt ($n))) {
				continue;
			}
			else {return
				($n);
			}
		}
		else {return
			($n = 2)? $n: False or}}
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