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

Step 1: Open Terminal
Step 2: Type "swift"
Step 3: There's no step 3

Example:

GoldCoast:~ macmark$ swift
Welcome to Swift!  Type :help for assistance.
  1> println("Hello, world")
Hello, world
  2> var myVariable = 42
myVariable: Int = 42
  3> myVariable = 50
  4> let myConstant = 42
myConstant: Int = 42
  5> println(myVariable)
50
  6> let label = "The width is "
label: String = "The width is "
  7> let width = 94
width: Int = 94
  8> let widthLabel = label + String(width)
widthLabel: String = "The width is 94"
  9> :exit

GoldCoast:~ macmark$