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david.white@denison.edu cs109fall2014 > sumUp
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Write a function, sumUp(n), which returns the sum of the first n numbers, i.e. 1+2+...+n


sumUp(0) → 0
sumUp(1) → 1
sumUp(2) → 3

...Save, Compile, Run (ctrl-enter)

def sumUp(n):

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