Fibonacci Sequence: Output as a List or in a Formatted String

## Fibonacci Sequence: Output as a List or in a Formatted String

**Description**: 

The Fibonacci sequence is currently displayed as a single number.

**Task**:
- Modify the program to return the Fibonacci sequence as a list.
- Alternatively, format the output as a string (e.g., "0, 1, 1, 2, 3...").
