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MathGroup Archive 2000

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Q: How to clear variables?

  • To: mathgroup at
  • Subject: [mg21564] Q: How to clear variables?
  • From: Ed McBride <emcbride at>
  • Date: Sat, 15 Jan 2000 02:04:06 -0500 (EST)
  • Organization: Wybron, Inc.
  • Sender: owner-wri-mathgroup at

If I run a Mathematica 3.0 notebook, and forget to define a variable I
subsequently use, Mathematica will grab the last value for that
variable, if it exists, even from another program, during the current

Is there a line, or lines, of code I can place at the start of a
notebook that says to forget all values, both numerica and symbolic, of
all variables?

Ed McBride, P.E.

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