[racket] low level question: why begin0?

From: Danny Yoo (dyoo at cs.wpi.edu)
Date: Sun Apr 29 14:03:59 EDT 2012

One question that I had stowed away a long time ago: why is begin0
part of the language?  It seems redundant in the face of having 'let'
to capture a value that we want to return at the end of some sequence.

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