# xarray.CFTimeIndex.fillna

#### CFTimeIndex.fillna(value)[[source]](https://github.com/pydata/xarray/blob/main/xarray/../.pixi/envs/doc/lib/python3.15/site-packages/pandas/core/indexes/base.py#L2859-L2921)

Fill NA/NaN values with the specified value.

Returns a new Index with all NA/NaN entries replaced by the given
scalar value.

* **Parameters:**
  **value** ([scalar](../user-guide/terminology.html.md#term-scalar)) – Scalar value to use to fill holes (e.g. 0).
  This value cannot be a list-likes.
* **Returns:**
  [`Index`](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Index.html#pandas.Index) – NA/NaN values replaced with value.

#### SEE ALSO
`DataFrame.fillna`
: Fill NaN values of a DataFrame.

`Series.fillna`
: Fill NaN Values of a Series.

### Examples

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```pycon
>>> idx = pd.Index([np.nan, np.nan, 3])
>>> idx.fillna(0)
Index([0.0, 0.0, 3.0], dtype='float64')
```

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