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# browser(_:numberOfRowsInColumn:)

Returns the number of rows of data in the specified column.

```
@MainActor optional func browser(_ sender: NSBrowser, numberOfRowsInColumn column: Int) -> Int
```

## Parameters

`sender`

The browser.

`column`

The index of the column.

## Return Value

The number of rows of data.

## Discussion

Either this method or [`browser(_:createRowsForColumn:in:)`](/documentation/AppKit/NSBrowserDelegate/browser(_:createRowsForColumn:in:)) must be implemented, but not both.

## See Also

[`-  browser:willDisplayCell:atRow:column:`](/documentation/AppKit/NSBrowserDelegate/browser(_:willDisplayCell:atRow:column:))

Gives the delegate the opportunity to modify the specified cell at the given row and column location before the browser displays it.


---

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