According to this answer

https://stackoverflow.com/questions/551950/what-stackless-programming-languages-are-available/671296#671296

all of these programming languages are stackless

  • Stackless Python
  • PyPy
  • Lisp
  • Scheme
  • Tcl
  • Lua
  • Parrot VM

What does it really mean for them to be stackless? Does it mean they don't use a call stack? If they don't use a call stack, what do they use?

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