Kotlin学习之Range

一.Range介绍

range即范围，定义方法如下

    val range1:IntRange =0..500//全闭区间
    val range2:IntRange =0 until 500//左闭右开区间

判断是否在某个范围内

    println(500 in range1)//true
    println(500 in range2)//false
    println(range1.contains(1))
/*

public class IntRange(start: Int, endInclusive: Int) : IntProgression(start, endInclusive, 1), ClosedRange {
    override val start: Int get() = first
    override val endInclusive: Int get() = last

    override fun contains(value: Int): Boolean = first