Given a string x, return the sum of all ASCII numbers of all characters.
for example, if x='lala' ('l'-> 108, 'a'->97) then y = 108+97+108+97
given 3 sides, find area of this triangle
Generate N equally spaced intervals between -L and L
Divide by 4
UICBioE240 problem 1.15
Add the positive numbers
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