Step-by-Step Explanation: Unsigned Integer Types

Kotlin provides a set of types for working with non-negative numbers, useful for tasks like bit manipulation and low-level IO.

1. The Four Unsigned Types

UByte: 8-bit, 0 to 255.
UShort: 16-bit, 0 to 65,535.
UInt: 32-bit, 0 to 4,294,967,295.
ULong: 64-bit, 0 to 2^64 - 1.

These are implemented as inline classes, meaning they carry zero runtime overhead compared to their signed counterparts.

2. Unsigned Literals

To create an unsigned number, add the u or U suffix. - 1u is a UInt by default. - 1uL or 1UL is explicitly a ULong. - If you assign a u literal to a UByte or UShort variable, the compiler handles the conversion if the value fits.

3. Explicit Conversions

Signed and unsigned types are not interchangeable. You must use conversion functions: - toInt().toUInt() and vice-versa. - Converting a negative signed number to an unsigned type preserves the binary representation (e.g., -1 becomes the maximum possible unsigned value).

4. Unsigned Arrays and Opt-in

Specialized array types like UIntArray exist to prevent boxing. - Experimental Status: As of current Kotlin versions, unsigned arrays are in Beta. To use them without warnings, you must use the @OptIn(ExperimentalUnsignedTypes::class) annotation.

5. Usage Recommendations

Kotlin's designers recommend using unsigned types only when you specifically need the extra bit range or for bitwise operations. For general-purpose "non-negative" values (like list sizes), signed integers are still preferred to help detect errors like negative indices.

6. Verification

Verified by building the project. The output demonstrated arithmetic results and the conversion of a negative signed integer to its unsigned equivalent.

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