euclid's gcd algorithm code example

Example 1: gcd algorithm

function gcd(a, b)
    if b = 0
        return a
    else
        return gcd(b, a mod b)

Example 2: euclid algorithm

function mcd($a,$b) {
	while($b) list($a,$b)=array($b,$a%$b);
	return $a;
}