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# start()

Causes the connection to begin loading data, if it has not already.

```
func start()
```

## Discussion

Calling this method is necessary only if you create a connection with the [`init(request:delegate:startImmediately:)`](/documentation/Foundation/NSURLConnection/init(request:delegate:startImmediately:)) method and provide <doc://com.apple.documentation/documentation/Swift/false> for the `startImmediately` parameter. If you don’t schedule the connection in a run loop or an operation queue before calling this method, the connection is scheduled in the current run loop in the default mode.

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