🟣 Kotlin Null Safety: Nullable Types and the ? Operator

# Kotlin Null Safety: Nullable Types and the `?` Operator

Kotlin's type system is designed to help prevent null pointer exceptions, a common source of errors in Java. It achieves this through **nullable types** and the use of the `?` operator.

## What are Nullable Types?

By default, a variable in Kotlin can hold only one value at a time. However, sometimes a variable might not have a value (it could be null). Nullable types allow you to declare that a variable *might* hold a null value. We denote this with the `?` suffix on the type.

**Example:**

```kotlin
var name: String? =

```kotlin
// Example 1: Safe call to access a property
val address: Address? = getAddress(1)
val streetName = address?.streetName ?: \