5.2.1.2 for 遍历字符串中的字符

正常写法:

package com.atguigu.day02

object ForDemo3 {
  def main(args: Array[String]): Unit = {
    val s: String = "abcdef"
    for (i <- 0 until  s.length) {
      print(s(i) + " ")
    }
  }
}

简洁写法:

package com.atguigu.day02

object ForDemo3 {
  def main(args: Array[String]): Unit = {
    val s: String = "abcdef"
    for(c <- s){
      print(c + " ")
    }
  }
}