LearnKotlin - Arrays and Loops

val array = Array(5) {it * 2}
println(array.asList())
[0, 2, 4, 6, 8]

import kotlin.math.pow

val array = Array(7) { 1000.0.pow(it)}
val sizes = arrayOf("byte", "kilobyte", "megabyte", "gigabyte",
        "terabyte", "petabyte", "exabyte")
for ((i, value) in array.withIndex()) {
    println("1 ${sizes[i]} = ${value.toLong()} bytes")
}
1 byte = 1 bytes1 kilobyte = 1000 bytes1 megabyte = 1000000 bytes1 gigabyte = 1000000000 bytes1 terabyte = 1000000000000 bytes1 petabyte = 1000000000000000 bytes1 exabyte = 1000000000000000000 bytes

var arrayNum : MutableList<Int>?= null
for(i in 11..15) arrayNum?.add(i) 

print(arrayNum)
null

var arrayNum : MutableList<Int?> = mutableListOf(null)
for(i in 11..15) arrayNum.add(i)

print(arrayNum)
[null, 11, 12, 13, 14, 15]

var arrayNum : MutableList<Int?> = mutableListOf()
for(i in 11..15) arrayNum.add(i)

print(arrayNum)
[11, 12, 13, 14, 15]

var numDivisibleBy7 : MutableList<Int> = mutableListOf()
for(i in 0..100 step 7) numDivisibleBy7.add(i)
print(numDivisibleBy7)
[0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]