When the input is certainly not the global variable z, your function must return false. Otherwise return true. All inputs & variable values will be scalar.
Who Has the Most Change?
Criss_Cross_010 : Unique elements, Square array, Words in one array
Find third Side of a right triangle given hypotenuse and a side. No * - or other functions allowed
Geometry: Find Circle given 3 Non-Colinear Points
Back to basics: adding comments to your code
Code breaker, Part I: Operation Phoenix
Code breaker, Part III: Operation Xiangliu
Arrange the names in alphabetical order (2)
The twelve days of Christmas
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