val t = (1,true,"hello")
t: (Int, Boolean, String) = (1,true,hello)

println(t._1,t._2,t._3)

println(t._1)
println(t._2)
println(t._3)

索引从1开始

遍历
t.productIterator.foreach(println)
1
true
hello


val t = 1 -> "a"
t: (Int, String) = (1,a)
println(t._1)
println(t._2)