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Question 249

Sum of Even Numbers up to Input

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Sum of Even Numbers up to Input

Read an integer n from standard input and print the sum of all even numbers from 1 through n (inclusive). For example, if the input is 10, the even numbers are 2, 4, 6, 8, 10 and their sum is:

30

Use printf with %d and no trailing newline.

Expected Output:

30
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10\n
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