scala - 在 Scala println 中格式化 Long 和 Double

Question

为了格式化 Long 或 Double 类型变量，我应该使用 '%' 之后的后缀是什么？

var LONG : Long = 9L;
println("The value of LONG is %?".format(LONG));
var DOUBLE : Double = 9.9;
println("The value of DOUBLE is %?".format(DOUBLE));

非常感谢。

Answer 1

In Scala we write

val height = 1.9d
val weight = 100L
val name = "James"
println(f"$name%s is $height%2.2f meters tall and weights $weight%3d kg")  // James is 1.90 meters and weights 100 kg