C# - for Loop Freezes at strange intervals

Question

I am working on Problem 14 on Project Euler, and my code seems to freeze at random intervals for no apparent reason.

static void Main()
{
    int maxNum = 0;
            


        

Answer 1

I've solved it in another way, by caching the result for each step, and I've found your problem. I doubt your program ever stops.
The statement num = (3 * num) + 1 may overflow over Int32.MaxValue and result in a negative number and an infinite loop(?).
In this case, you can solve the problem by using long for your x.