val l = b!!.length
// it will ignore it.
val listWithNulls: List<String?> = listOf("Kotlin", null)
for (item in listWithNulls) { item?.let { println(it) } // prints Kotlin and ignores null }
// it will throw a exception // // it will ignore it. val listWithNulls: List<String?> = listOf("Kotlin", null) for (item in listWithNulls) { item!!.let { println(it) } // prints Kotlin and ignores null }