Multiply x n times ( x ^ n = x * x * x ... . n times )
for ( int i = 2 ; i <= n ; i ++ ) res_size = multiply ( x , res , res_size ) ; System . out . print ( x + " ^ " + n + " ▁ = ▁ " ) ; for ( int i = res_size - 1 ; i >= 0 ; i -- ) System . out . print ( res [ i ] ) ; }