scala字符串输出操作

object Hello {
  def main(args: Array[String]): Unit = {
    val name = "lilei"
    val age = 16
    //字符串拼接操作
    println("name = "   name  ".age = age")  //name = lilei.age = age

    //*号将一个字符串多次输出
    println(name * 3)   //lileilileililei

    //printf可以用%传值输出
    printf("name = %s   age = %d",name,age)   //name = lilei   age = 16

    //字符串模板（插值字符串）：通过$获取变量值
    println(s"name = ${name},age = ${age}")  //name = lilei,age = 16

    val pai = 3.141592
    println(s"num is ${pai}%2.3f")  //num is 3.141592%2.3f
    println(f"num is ${pai}%2.3f")  //num is 3.142
    println(raw"num is ${pai}%2.3f")  //num is 3.141592%2.3f

    //多行字符串，在 Scala中，利用三个双引号包围多行字符串就可以实现。
    //输入的内容，带有空格、\t 之类，导致每一行的开始位置不能整洁对齐。
    //应用 scala 的 stripMargin 方法，在 scala 中 stripMargin 默认
    // 是“|”作为连接符，//在多行换行的行头前面加一个“|”符号即可
    val s =
      """
      |select
      |   name,
      |   age
      |from
      |   student
      |""".stripMargin
    println(s)
  }
}

最后s输出

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