| Method | Inputs | Outputs | Usage |
|---|---|---|---|
| .loc | Label-based | Series/data | Row/col access by index name |
| .at | Label-based | Scalar | Fast lookup for single cell (label) |
| .iloc | Position-based | Series/data | Access by row/col number |
| .iat | Position-based | Scalar | Fast lookup for single cell (position) |