Kodebits Day 14: runCatching Fallback

What is the output?

fun risky(n: Int): Int {
  if (n == 0) error("bad")
  return 10 / n
}
fun main() {
  val out = runCatching {
    risky(0)
  }.getOrElse { -1 }
  println(out)
}

Try it in the online Kotlin Playground →

[spoiler title="Solution"]

Answer:

-1

Explanation:

risky(0) throws, runCatching captures it, and getOrElse returns -1.

[/spoiler]

Further Reading

• Error Handling With Functional Programming
• Leverage Kotlin Functions & Lambdas