Challenge 2: Ranges and Loops — Solution

fun main() {
    for (i in 1..20 step 2) {
        print("$i ")
    }
    println()

    val colors = listOf("red", "green", "blue")
    for ((index, color) in colors.withIndex()) {
        println("$index: $color")
    }
}

/*
Output:
1 3 5 7 9 11 13 15 17 19
0: red
1: green
2: blue

Notes:
- 1..20 step 2 is an inclusive range from 1 to 20, advancing by 2 each
  time, which naturally lands on every odd number in that range.
- colors.withIndex() produces a sequence of (index, value) pairs; the
  for-loop destructures each pair directly into "index" and "color" in
  the loop header.
*/