Problem
Add all odd numbers from 1 up to and including n, using a loop.
Implement sum_of_odds(n).
Input
n: The upper limit.
Output
Return the sum of the odd numbers from 1 through n (0 if there are none).
Constraints
0 ≤ n ≤ 1,000,000
Examples
Example 1
Input:
n = 7
Expected output:
expected = 16Input:
long long n = 7;
Expected output:
long long expected = 16;Input:
long n = 7;
Expected output:
long expected = 16;Explanation
1 + 3 + 5 + 7 = 16.
Example 2
Input:
n = 0
Expected output:
expected = 0Input:
long long n = 0;
Expected output:
long long expected = 0;Input:
long n = 0;
Expected output:
long expected = 0;Explanation
There are no odd numbers from 1 to 0, so the sum is 0.
References
This challenge is adapted for CodeUtility. Follow the statement and constraints above.