Swift 'if let' statement equivalent in Kotlin

Question

In Kotlin is there an equivalent to the Swift code below?

if let a = b.val {

} else {

}

Answer 1

My answer is totally a copy cat from the others. However, I cannot understand their expression easily. So I guess it would be nice to provide an more understandable answer.

In swift:

if let a = b.val {
  //use "a" as unwrapped
}
else {

}

In Kotlin:

b.val?.let{a -> 
  //use "a" as unwrapped
} ?: run{
  //else case
}