Using the 'let' Function for Transforming Collections

The 'let' function can be particularly useful when you want to perform operations on each element of a collection while also transforming those elements. By combining 'let' with 'map', you can create a new collection with transformed elements in a concise and readable way.

val numbers = listOf(1, 2, 3, 4, 5)
val squaredNumbers = numbers.map { it.let { number -> number * number } }
println(squaredNumbers) // Output: [1, 4, 9, 16, 25]