Expression

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An Expression in TouchDesigner is a text string that contains data (string, float, list, boolean, etc.) and operators (+ * < etc) that are evaluated by the operator's language (python or Tscript) and returns a string, float list or boolean, etc.

Expressions are used in Parameters, DATs (especially the Evaluate DAT), Tscript Commands and Scripts.

For Python expressions, see Python.

For Tscript expressions, see Tscript Expressions.

A text string that contains data (string, float, list, boolean, etc.) and operators (+ * < etc) that are evaluated by the node's language (python or Tscript) and returns a string, float list or boolean, etc. Expressions are used in parameters, and in scripts.

TouchDesigner's original built-in Command scripting language prior to .