Kotlin中基本类型的定义及用法
val aBoolean: Boolean = true
val anotherBoolean: Boolean = false
val anInt: Int = 8
val anotherInt: Int = 0xFF //255
val moreInt: Int = 0b00000011 //3
val maxInt: Int = Int.MAX_VALUE //2147483647（2的31次方-1）
val minInt: Int = Int.MIN_VALUE //-2147483648（－2的31次方）
val aLong: Long = 12368172397127391
val another: Long = 123
val maxLong: Long = Long.MAX_VALUE //（2的63次方-1）
val minLong: Long = Long.MIN_VALUE //（－2的63次方）
val aFloat: Float = 2.0F //（2.0是双精度类型，必须要加上F）
val anotherFloat: Float = 1E3f //（10的三次方）
val maxFloat: Float = Float.MAX_VALUE
val minFloat: Float = -Float.MAX_VALUE
val aDouble: Double = 3.0 //感觉Double比Float要好
val anotherDouble: Double = 3.1415926
val maxDouble: Double= Double.MAX_VALUE
val minDouble: Double= -Double.MAX_VALUE
val aShort: Short = 127
val maxShort: Short = Short.MAX_VALUE //32767
val minShort: Short = Short.MIN_VALUE //-32768
val maxByte: Byte = Byte.MAX_VALUE //127
val minByte: Byte = Byte.MIN_VALUE //-128
val aChar: Char = '0' //字符用'，字符串用"
val bChar: Char = '中'
val cChar: Char = '\u000f' //"\u"表示Unicode
val string: String = "HelloWorld"
val fromChars: String = String(charArrayOf('H', 'e','l','l','o','W','o','r','l','d'))
val rawString: String = """
\t
\n
\\\\\\$$$ salary
""" //长字符串无法使用转义符 Kotlin中基本类型转换
*Kotlin不支持隐式转换
val anInt:Int = 5
val aLong:Long = anInt.toLong()