Kotlin Basic Programs for Beginners

What is the output of the following Kotlin code?

fun main() {
val num1: Int? = null
val num2: Int = 5
println(num1 ?: num2)
}

What is the output of the following Kotlin code?

fun main() {
var i = 0
while (i < 5) {
println("Hello, world!")
i++
}
}

What is the output of the following Kotlin code?

fun main() {
val str = "hello, world"
val result = str.filter { it.isLetter() }
println(result)
}

What is the output of the following Kotlin code?

fun main() {
val nums = arrayOf(1, 2, 3, 4, 5)
val result = nums.min()
println(result)
}

What is the output of the following Kotlin code?

fun main() {
val str = "hello, world"
val result = str.split(" ")
println(result)
}

What is the output of the following Kotlin code?

fun main() {
val arr = arrayOf(1, 2, 3, 4, 5)
for (i in arr.indices step 2) {
println(arr[i])
}
}

What is the output of the following Kotlin code?

fun main() {
val nums = arrayOf(1, 2, 3, 4, 5)
val result = nums.max()
println(result)
}

What is the output of the following Kotlin code?

fun main() {
val nums = arrayOf(1, 2, 3, 4, 5)
val sum = nums.reduce { acc, num -> acc + num }
println(sum)
}

What is the output of the following Kotlin code?

fun main() {
val nums = arrayOf(1, 2, 3, 4, 5)
val result = nums.filter { it % 2 == 0 }
println(result)
}

What is the output of the following Kotlin code?

fun main() {
val nums = arrayOf(1, 2, 3, 4, 5)
val result = nums.sum()
println(result)
}