Audrey's Kotlin for Developers Cheatsheet

gistfile1.txt

## Variables

Declare var for a mutable variable:

```kotlin
var name = "John"
name = "Jane"
```

Declare val for a read-only constant:

```kotlin
val pi = 3.14
```

## Functions

```kotlin
fun greeting(): String {
    return "Hello!"
}

println(greeting())
```

## Classes

```kotlin
class Person(var name: String)

val person = Person("John")
person.name = "Jane"
```

## Collections

```kotlin
val numbers = mutableListOf(1,2,3)
numbers.add(4)

val numsSet = setOf(1,2,3)
println(numsSet.contains(2))
```

## Control Flow

```kotlin
fun max(a: Int, b: Int): Int {
    return if (a > b) a else b
}

val result = max(1, 2)
```