title: How to read an environment variable in Kotlin?
body: <p>I'd like to get a certain value from an environment variable in my Kotlin app, but I can't find anything about reading environment variables in the <a href="https://kotlinlang.org/api/latest/jvm/stdlib/index.html" rel="noreferrer">core libraries</a> documentation.  </p>
  
  <p>I'd expect it to be under <a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.system/index.html" rel="noreferrer">kotlin.system</a> but there's really not that much there.</p>