Reproduction steps:

1. Open the attached (UnsignedVariablesTest.zip) project
2. Open the “Assets/Scenes/SampleScene.unity” Scene
3. Enter the Play Mode
4. Select the “Directional Light” GameObject in the Hierarchy window
5. Check the “Set Max Uint Value” and “Set Max Ulong Value” boxes under the “New Behaviour Script” Script Component
6. Observe the “Uint Value” and “Ulong Value” values in the Inspector window and in the Console
7. Try setting the same value in the Inspector window to match the value presented in the Console
8. Observe the values in the Console and in the Inspector window

Expected result: Values match between the Console and in the Inspector window
Actual result: The values don’t match between the Console and the Inspector window

Reproducible with: 2020.3.44f1, 2021.3.16f1, 2022.1.24f1, 2022.2.2f1, 2023.1.0a25

Reproducible on: Windows 10 (21H2)

Notes:

• When setting the max value with the “Set Max Uint Value” and “Set Max Ulong Value” fields from the Inspector window, both values report -1 in the Inspector window, however, they are actually set to their max values from the Script and it’s seen in the Console
• When setting the max value of uint in the Inspector window manually it reports the max value of a signed int variable and it doesn’t allow entering a value above it, however, entering a negative value is possible, which shouldn’t be, and the actual value is set to 0
• Similar behaviour as described in the previous notes is also seen with ulong variable. Setting a negative value for ulong from the Inspector window results in a value, which is calculated by subtracting the entered negative value from the max value of unsigned long
• TL;DR Inspector doesn’t represent the actual value once it goes beyond the value of a regular int or long (either in the positive or negative side)