Random int Value

That's not the way Unity works, that's how almost all random number generators for integer numbers work (processing, .NET / C#, Java, javascript, python, golang, Delphi, lisp, octave).

And you don't always have to add 1. One of the most common usage is this:

 SomeType[] someArray;
 
 someArray[Random.Range(0, someArray.Length)]

as @Bunny83 says, this is not at all an "always". If it was "always" it wouldn't work this way. While it may not be the major use case @roymeredith has personally encountered, randomly selecting an integer is very often done to index to a random item in an array or other enumerated data collections. This will thus often be done with Random.random(0, someArray.Length) as @Bunny83 shows. If the max was inclusive in this case you'd have to very often SUBTRACT 1 to the length since indexing begins at 0. Since so much begins counting at 0 as opposed to 1 in coding, it just makes more sense that max be exclusive for integer randomization. Digressing a bit though my comment's purpose is not to just be redundant of @Bunny83 . There are still cases where you might want that max value to be inclusive. This is, like op said, solved by adding 1 to the max number. However, if you're doing this often this could end up looking un-elegant or unintuitive. So, if you're needing to do this often I'd suggest a wrapper for the random function that did this for you. Something like: public int InclusiveRandom(int $$anonymous$$, int max) { return Random.random($$anonymous$$, ++max); } I like to make a static Utility class which has little helper functions and wrappers like this for exactly this kind of thing.