# Array Methods

| Method | Description | Example | Result |
|--------|-------------|---------|--------|
| `.추가(값)` | Append | `arr.추가(6)` | mutates in place |
| `.삭제(인덱스)` | Remove at index | `arr.삭제(0)` | returns removed value |
| `.길이()` | Length | `arr.길이()` | `5` |
| `.포함(값)` | Contains | `arr.포함(3)` | `참` |
| `.역순()` | Reverse | `arr.역순()` | new reversed array |
| `.정렬()` | Sort | `arr.정렬()` | new sorted array |
| `.합치기(구분자)` | Join to string | `arr.합치기(", ")` | `"1, 2, 3"` |
