Directions: Use the Design Recipe to write a function lawn-area that takes in the length and width of a rectangular lawn and returns its area.
Contract and Purpose Statement |
Every contract has three parts…
_________::______________->______
______________________________________________________________________
Examples |
Write some examples, then circle and label what changes…
examples:
_________ (______) is _______
_________ (________) is _________
end
Definition |
Write the definition, giving variable names to all your input values…
fun _________(_____________):
______________
end
Directions: Use the Design Recipe to write a function rect-perimeter that takes in the length and width of a rectangle and returns the perimeter of that rectangle.
Contract and Purpose Statement |
Every contract has three parts…
______________::______________->______
_____________________________________________________________________________
Examples |
Write some examples, then circle and label what changes…
examples:
______________ (______) is _____________
______________ (________) is _______________
end
Definition |
Write the definition, giving variable names to all your input values…
fun ______________(_____________):
____________________
end
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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