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kotlinlang

```fun main() {
    println("%s %s".format("hi", "bye"))
    println("%s %s".format(*arrayOf("hi", "bye")))
    println("%s %s".format(arrayOf("hi", "bye"))) // java.util.MissingFormatArgumentException: Format specifier '%s'
}```
Anyone know why it goes wrong with a pure array declaration?

unlike Java, `.format(x)` doesn't change behavior based on whether `x` is an array or not

in your third case, the function is actually receiving `arrayOf(arrayOf("hi", "bye"))` (the outer array being generated by the compiler, same as in the first case)

ah yes I see, since the argument accepts a varargs of Any? It just accepts the input itself as the Any?

Think about what would be passed if you wrote
```println("%s %s".format(arrayOf("hi", "bye"), arrayOf("1", "2")))```
and in what ways it is similar to your third case