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Difference between two commands.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg90474] Difference between two commands.
  • From: Budaoy <yaomengliang at gmail.com>
  • Date: Thu, 10 Jul 2008 06:36:45 -0400 (EDT)

What's the difference between these two commands: << and Needs?
Sometimes we use <<Graphics` and sometimes we use
Needs["ComputerArithmetic`"]. Where do they distinguish from each
other?


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