Iterating Over Elements

Now that you know how to create and modify lists, it's time to learn how to process each element one by one. This is called iteration, and it's one of the most common operations you'll perform with lists.

The for loop provides a clean way to iterate over every element in a list:

val fruits = listOf("Apple", "Banana", "Cherry")
for (fruit in fruits) {
    println(fruit)
}
// Output:
// Apple
// Banana
// Cherry

Inside the loop, the variable fruit takes on each value from the list in order. You can name this variable anything that makes sense for your data. The loop automatically stops after processing the last element.

This pattern works great when you need to perform an action on each item, like calculating a total:

val prices = listOf(10, 25, 15)
var total = 0
for (price in prices) {
    total += price
}
println(total)  // 50

The same syntax works with any list type, whether it contains strings, numbers, or other values.