C#•2y ago

✅ dumb question involving Math.Max

Given that a and b are 32-bit integers within the range of -100 to 100, this should always return True right?

int first = a < b ? 0 : a - b;
int second = Math.Max(a - b, 0);
return first == second;

int first = a < b ? 0 : a - b;
int second = Math.Max(a - b, 0);
return first == second;

3 Replies

BenMcLeanOP•2y ago

my brain's scrambled and i'm up way too late, that's my problem yeah ... no exception. what the heck

for (int a = -100; a < 100; a++)
    for (int b = -100; b < 100; b++)
        if ((a < b ? 0 : a - b) != Math.Max(a - b, 0))
            throw new Exception();

for (int a = -100; a < 100; a++)
    for (int b = -100; b < 100; b++)
        if ((a < b ? 0 : a - b) != Math.Max(a - b, 0))
            throw new Exception();

ero•2y ago

why would this throw an exception? you just said yourself that they should always be equal so they're never not equal. which is what you're testing for

BenMcLeanOP•2y ago

yeah i was getting a result that looked crazy but it turns out i just needed to change an X to a Z in a different place 🙂 how i delete this i got it figured out, it wasn't this

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✅ dumb question involving Math.Max