//go:build OMIT package main import ( "fmt" "math" ) func compute(fn func(float64, float64) float64) float64 { return fn(3, 4) } func main() { hypot := func(x, y float64) float64 { return math.Sqrt(x*x + y*y) } fmt.Println(hypot(5, 12)) fmt.Println(compute(hypot)) fmt.Println(compute(math.Pow)) }