> For the complete documentation index, see [llms.txt](https://docs.fabricplan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fabricplan.com/documentation/plan/planning-sheets/formula-syntax/math-functions/indexof.md).

# INDEXOF

The *INDEXOF* function returns the index of the first occurrence of a specified value within a list of values. The arguments can be numeric values or node references. If the value is not found in the list, the function returns -1.

#### Syntax

```javascript
INDEXOF(list, value)
```

#### Arguments

* `list`: The list of values to search.
* `value`: The value to find in the list.

#### Return value

Returns the index of the first matching value in the list. The index starts at 0. If no match is found, the function returns -1.

#### Example

```javascript
INDEXOF([2025.Q2.Actuals, 2025.Q3.Actuals, 2025.Q4.Actuals], 2025.Q1.Actuals)
```

In this example, the INDEXOF function is used to identify whether the *Q1 Actuals* value of 2025 exists in the *Q2 Actuals*, *Q3 Actuals*, and *Q4 Actuals* values of 2025 and returns its index position.

<figure><img src="/files/2syJ0qk608EEYnrpQXGJ" alt=""><figcaption></figcaption></figure>


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