Proper way to check that a numerical range "is valid"

  • Thread starter Thread starter illegal.prime
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illegal.prime

Hey all, I have an app, that could take two numbers of any type of
numerical type int, long, double, float, uint, ulong, etc. I want to
check that the numbers are part of a range that I consider "valid".
For my circumstances, I don't consider float.PositiveInfinity valid,
nor do I consider the two numbers valid if the second number is smaller
than the first. In other words, I want to check that the range is
valid.

I notice that while float and double have PositiveInfinity int does
not. Does int have no comparable concept? They obviously have
MaxValue and MinValue, but I'm looking for a concept similar to
positive or negative infinity.

In summary, I just want to make my valid range check code as robust and
thorough as possible.

Thanks,
Novice
 
Hey all, I have an app, that could take two numbers of any type of
numerical type int, long, double, float, uint, ulong, etc. I want to
check that the numbers are part of a range that I consider "valid".
For my circumstances, I don't consider float.PositiveInfinity valid,
nor do I consider the two numbers valid if the second number is smaller
than the first. In other words, I want to check that the range is
valid.

I notice that while float and double have PositiveInfinity int does
not. Does int have no comparable concept? They obviously have
MaxValue and MinValue, but I'm looking for a concept similar to
positive or negative infinity.

In summary, I just want to make my valid range check code as robust and
thorough as possible.
Click to expand...

MinValue and MaxValue are as close as you can get for Int (or any
non-floating point type). These types simply have no concept of infinity -
all possible bit patterns of their representations correspond to valid
integers within their domain.

-cd
 
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