How can I use swift in Terminal?

Question

I read What\'s new in Xcode 6. The article introduces some new feature about Xcode 6, and it says:

Command Line

Xcode’s debugger includes an inter

Answer 1

With the help of Swift REPL(Read Eval Print Loop).

Developers familiar with interpreted languages will feel comfortable in this command-line environment, and even experienced developers will find a few unique features

Launch Terminal.app and type swift and press enter. You’ll then be in the Swift REPL.

        1> print("Hello Swift REPL")
     Hello Swift REPL
        2> 10 + 20
     $R0: Int = 30
        3> var name = "Yogendra Singh"
     name: String = "Yogendra Singh"
        4> print(name)
     Yogendra Singh
        5>