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When you pass numeric data into a node that expects a different numeric data type, LabVIEW coerces the data to a data type the node accepts if the data types are similar enough.

To alert you to the coercion, LabVIEW places a coercion dot on the node input or output where the coercion takes place.

Note  

Coercions that occur in a document targeted to an FPGA can consume significant logic resources. Make sure to review any coercions that occur in a document targeted to an FPGA.