// funct4.swift
// Functions are a first-class type. This means that a function
// can return another function as its value.

#if os(OSX) || os(iOS) // for libraries, portable for OSX and Linux
import Foundation
#elseif os(Linux)
import Glibc
#endif// 

func makeIncrementer() -> ((Int) -> Int) {
  func addOne(number: Int) -> Int {
    return number + 1
  }
  return addOne
}

print("funct4.swift running")
var increment = makeIncrementer()
let ans = increment(7)
print(ans)
print("funct4.swift finished")