package main import ( "fmt" ) type MathFunc func (int, int) int func Add(a int, b int) int { return a + b } func Sub(a int, b int) int { return a + b } func TenMath(math MathFunc) int { return math(10, 10) } func main() { using_add := TenMath(Add) fmt.Println("using_add is", using_add) using_sub := TenMath(Sub) fmt.Println("using_sub is", using_sub) }