val 不可变

var 可变

val x:int = 1

val x = 1

scala> val decimal = 11235L
decimal: Long = 11235

scala> val hexa = 0x23
hexa: Int = 35

scala> val i = 1
i: Int = 1

scala> val i2: Byte = 1
i2: Byte = 1

scala> val d = 0.0
d: Double = 0.0

scala> val f = 0.0f
f: Float = 0.0

scala>val exponent = 1e30
exponent: Double = 1.0E30

val s = "wsevwev"

Scala 类型