val power Int Int Int case case if power n-1 case if power power

val power: Int => (Int => Int) = 
	n => {	
		case 0				=> 1
		case x if (n%2==1)	=> power(n-1)(x) * x
		case x if (n%2==0)	=> power(n/2)(x) * power(n/2)(x)
}