What is the difference between list and tuple?

Question

Accepted Answer

**list** and **tuple** are both ordered collections, but differ in mutability.

**list (mutable):**
```python
fruits = ["apple", "banana"]
fruits.append("orange")  # OK
fruits[0] = "grape"      # OK
```

**tuple (immutable):**
```python
fruits = ("apple", "banana")
# fruits.append("orange")  # Error!
# fruits[0] = "grape"      # Error!
```

**When to use:**
- **list** — when data changes (adding, removing).
- **tuple** — when data is constant (coordinates, configuration).

**Memory:** tuple uses less memory than list.

Python: What is the difference between list and tuple?