Higher-order functions Functions can be returned as return values x(y.×-y Functions can be passed as arguments (f.2x.fx)⑦x.x+12 Think about function pointers in C/C++. Higher-order functions • Functions can be returned as return values • Functions can be passed as arguments Think about function pointers in C/C++. x. y. x - y (f. x. f x) (x. x + 1) 2