Is the result of the following formula odd or even? 1+2+3+4+… +2009+2010．

Is the result of the following formula odd or even? 1+2+3+4+… +2009+2010．

There are 1005 odd numbers and even numbers from 1 to 2010. According to even number + even number = even number, we can get even numbers 2, 4, 6 The sum of 20082010 is even, while 1, 3, 5 According to odd number + odd number = even number, odd number + even number = odd number, we can get 1, 3, 5 The sum of 1005 odd numbers is odd, so 1 + 2 + 3 + 4 + +2009 + 2010 and are odd numbers +2009 + 2010 is odd

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