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Naming Things
Suppose you know:
x = 147,273 y = -98,327
You want to compute
x
2
+ xy + y
2
Can compute this using the numbers directly:
(+ (* 147273 147273) (* 147273 -98327) (* -98327 -98327))
This is laborious and prone to errors.
A better way is to give names to the numbers with
definitions
.
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