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Instructions for students & labbies: Students use DrScheme, following the design recipe, on the exercises at their own pace, while labbies wander among the students, answering questions, bringing the more important ones to the lab's attention.
Quick Review of Scope
*A function definition introduces a new local scope - the parameters are defined within the body.
(define (parameters...) body)
*A local definition introduces a new local scope - the names in the definitions are defined within both within the bodies of the definitions and within the local's body.
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(local \[definitions...\] body) |
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*Note that the use of square brackets \[ \] here is equivalent to parentheses( ). The brackets help set off the definitions a little more clearly for readability. |
*In order to use local and the other features about to be introduced in class, you need to set the DrScheme language level to "Intermediate".
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