`let` is when you have something, and you want to ...

# getting-started

[apatrida]

let is when you have something, and you want to change it to something else. Think of it as map for a single value. And you can use it along with the ?. operator to do something if the value isn't null

val hello: String = getTheirName().let { "hello ${it}" } 
val number: Int = getTheirPhoneAsString().let { it.toLong() }