# Getting started
Get started with Formulas the same way as any other spreadsheet - click `=` on a cell and get started right away. Formulas are in-line by default.
In-line formulas in Quadratic
You can also optionally use multi-line Formulas for those Formulas that need to be expanded to become readable.
To open the multi-line editor either use / and select it in the cell type selection menu or use the multi-line editor button from the in-line editor as showed below.
The multi-line editor becomes useful when Formulas become more difficult to read than the space afforded by the in-line editor. Example:
```sql
IF( Z0 > 10,
IF( Z1 > 10,
IF (Z2 > 10,
AVERAGE(Z0:Z2),
"Invalid Data",
),
"Invalid Data",
),
"Invalid Data",
)
```
Cells are by default referenced relatively in Quadratic. Use $ notation to do absolute references, similar to what you'd be familiar with in traditional spreadsheets. Learn more on the [reference-cells](https://docs.quadratichq.com/formulas/reference-cells "mention") page.
