Kotlin program using array traversal

fun main() {

    val nums = arrayOf(1, 2, 3, 4, 5, 6, 7)

    nums.forEach({ e -> print("$e ") })

    println()

    nums.forEachIndexed({i, e -> println("nums[$i] = $e")})

    for (e in nums) {
        print("$e ")
    }

    println()

    val it: Iterator<Int> = nums.iterator()

    while (it.hasNext()) {
        
        val e = it.next()
        print("$e ")
    }
}

Output:
1 2 3 4 5 6 7 
nums[0] = 1
nums[1] = 2
nums[2] = 3
nums[3] = 4
nums[4] = 5
nums[5] = 6
nums[6] = 7
1 2 3 4 5 6 7 
1 2 3 4 5 6 7