Using the 'reduce' Function for Accumulating Values in Collections

The 'reduce' function is a powerful tool in Kotlin that allows you to accumulate values from a collection into a single result. It applies a specified operation on each element of the collection, carrying over the accumulated value to the next iteration. This can be particularly useful for scenarios like summing numbers, concatenating strings, or combining objects.

val numbers = listOf(1, 2, 3, 4, 5)
val sum = numbers.reduce { accumulator, number -> accumulator + number }
println("Sum of numbers: $sum") // Output: Sum of numbers: 15