This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


evaluates expr, starting a fresh evaluation stack.
  • You can use StackBegin to prevent "outer" evaluations from appearing in the evaluation stack when you call Stack.
  • A StackBegin is automatically done when the evaluation of each input line begins in an interactive Mathematica session.
Show only the evaluations being done inside of f:
Get the detailed stack contents:
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