> For the complete documentation index, see [llms.txt](https://docs.quadratichq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.quadratichq.com/formulas/getting-started.md).
# Getting started
Work with classic spreadsheet logic - math, references, and point and click manipulation for quick data analysis.
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](/formulas/reference-cells.md) page.
---
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