Given the radius x, y would be the area of a circle.
Pi = 3.1416
Return the first and last character of a string
Find the nearest integer
Remove the positive integers.
UICBioE240 problem 1.13
ASCII code of a leter.
Vector with a repeated entry
Given the variable x as your input, multiply it by four, then divide it by two. Then put the result in y.
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