Converting string to Long using string.toLongOrNull()

In this example, we will see how we can parse a string using the .toLongOrNull() method:

fun main(args: Array<String>) {
  val str="123.4"
  val str2="123"
  println(str.toLongOrNull())
  println(str2.toLongOrNull())
}

On running the preceding program, the following output is generated:

 null 123