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Find the difference between the sum of all even numbers and the sum of all odd numbers from 0 through 1000.
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Find the difference between the sum of all even numbers and the sum of all odd numbers from 0 through 1000.

User Kabeersvohra
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Think of it this way for eery even number there is an odd number that +1 it so if you find the difference between those it is 1
(EX: 1 and 2) (EX: 1+3 and 2+4)
so there are 500 odd numbers so when you add it up the evens add up 500 more
User Harith
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