Stack

Stack[ ] shows the current evaluation stack, giving a list of the tags associated with evaluations that are currently being done.

Stack[pattern] gives a list of expressions currently being evaluated which match the pattern.

Stack[_] shows all expressions currently being evaluated.

You can call Stack from inside a dialog to see how the dialog was reached.

In the list returned by Stack[pattern], each expression is wrapped with HoldForm.

The maximum length of Stack[ ] is limited by $RecursionLimit.

Stack has attribute HoldFirst.

See The Mathematica Book: Section 2.5.11.

See also: Trace.

Further Examples