Scala入门与进阶（二）- Scala入门

scala> var d = 1.1
d: Double = 1.1

scala> var e:Float = 1.1
<console>:11: error: type mismatch;
found : Double(1.1)
required: Float
var e:Float = 1.1
^
scala> var e:Float = 1.1f
e: Float = 1.1

scala> val f = 10
f: Int = 10

scala> val g = 10.asInstanceOf[Double]
g: Double = 10.0

scala> val h = 10.isInstanceOf[Int]
h: Boolean = true

scala> val info = fromFile("/Users/markgao/Desktop/hello.txt").mkString
info: String =
"hello
"

scala> lazy val info = fromFile("/Users/markgao/Desktop/hello.txt").mkString
info: String = <lazy>

scala> info
res10: String =
"hello
"

scala>