Positive integers in array sum to a negative number
arrays, c#, negative-number, sum-of-digits
Solution
the length of the array is 148933.
Most probably your sum is over flowing the possible values for int (-2,147,483,648 to 2,147,483,647), that is why you see negative numbers.
Use `long` for your sum calculation. But you might need BigInteger to calculate the sum.
Problem
I have this piece of code: ``` int[] primes = generatePrimes(bound); int sum = 0; for (int i = 0; i < primes.GetLength(0); i++) { if (sum < 0) { Console.WriteLine(sum); } sum += primes[i]; } ``` I have checked to make sure that my array "primes" only contains positive integers like so: ``` if (primes[i] < 0) { Console.WriteLine(primes[i]); } ``` But nothing will be printed. However, for some reason the sum will sometimes be negative and will get printed when I run the first piece of code. The length of the array is 148933. I don't know that much C#, but I didn't think that the length should matter here? :S If someone knows why this is happening, I would greatly appreciate any help.