# contains

```kotlin
val list = listOf(1, 2, 3, 4, 5)
println(list.contains(3))  // true
println(list.contains(6))  // false
println(list.containsAll(listOf(2, 5)))  // 2와 5 있음 -> true
println(list.containsAll(listOf(2, 6)))  // 2와 6 없음 -> false
```