$ mkdir projects-swift
$ cd projects-swift
hello.swift
#!/usr/bin/env swift
let name = "Jobs"
print("I'm Steve" + name)
$ swift hello.swift
I'm SteveJobs
参考
http://qiita.com/merrill/items/be12ea2e1f3cb8304ee2
http://marui.hatenablog.com/entry/2015/03/26/113659