LabVIEW uses a Dataflow model for executing code. In a LabVIEW application, a block diagram element can only execute after receiving data for all required inputs. When a block diagram element executes it can return data which in turn 'flows' to other block diagram elements. This Dataflow is used to control program execution.

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• A block diagram element can only execute after receiving data for all required inputs
  
  
• Block diagram elements typically have input terminals on the left and output terminals on the right.
  
  
  • This helps organize code such that data 'flows' from left to right.
• Block diagram elements with no data wire between them to force execution could execute in any order.
  
  
• It's common to use an error wire to connect block diagram elements in order to ensure the desired execution order.
  
  

LabVIEW Basics