package main import "fmt" /* * Append will reallocate the underlying array if needed, increasing the * capacity. As you can see, the capacity here doubles each time (though * I suppose the exact amount is an implementation issue). This is a * typical approach, which makes the number of reallocations log n for * n increments, while wasting less than 1/2 of the allocated space. */ func main() { sl := make([]int,0) for i := 0; i < 300 ; i++ { fmt.Printf("length = %d, capacity = %d\n", len(sl), cap(sl)) sl = append(sl, i) } fmt.Printf("length = %d, capacity = %d\n", len(sl), cap(sl)) }