> ## Documentation Index > Fetch the complete documentation index at: https://docs.syntblaze.com/llms.txt > Use this file to discover all available pages before exploring further. # Swift UInt32 `UInt32` is a fixed-width, unsigned 32-bit integer value type in Swift. It represents non-negative whole numbers using exactly 4 bytes (32 bits) of memory. Unlike the standard `Int` or `UInt` types, which vary in size depending on the underlying system architecture (32-bit or 64-bit), `UInt32` guarantees a strict 32-bit footprint across all platforms. ## Value Range Because it is unsigned, `UInt32` cannot represent negative numbers. Its memory is entirely dedicated to positive magnitudes. * **Minimum Value:** `0` * **Maximum Value:** `4,294,967,295` ($2^{32} - 1$) You can access these boundaries programmatically using the type's static properties: ```swift theme={"dark"} let absoluteMin = UInt32.min // 0 let absoluteMax = UInt32.max // 4294967295 ``` ## Initialization and Type Conversion Swift is a strongly typed language and does not implicitly convert between different integer types. You must explicitly initialize a `UInt32` when converting from another numeric type. ```swift theme={"dark"} // Literal initialization let explicitUInt32: UInt32 = 25000 // Conversion from standard Int let standardInt: Int = 1024 let convertedUInt32 = UInt32(standardInt) // Conversion from a floating-point type (truncates the decimal) let doubleValue: Double = 3.14159 let truncatedUInt32 = UInt32(doubleValue) // 3 ``` *Note: Attempting to initialize a `UInt32` with a negative value or a value exceeding `4,294,967,295` will trigger a runtime crash.* ## Overflow Behavior By default, Swift arithmetic operators (`+`, `-`, `*`) trap and trigger a runtime error if an operation exceeds the bounds of `UInt32`. To perform modulo arithmetic that wraps around the type's boundaries, you must use Swift's overflow operators (`&+`, `&-`, `&*`). ```swift theme={"dark"} var maxBoundary = UInt32.max // Standard addition traps on overflow // maxBoundary += 1 // Fatal error: arithmetic overflow // Overflow addition wraps to the minimum value let wrappedAddition = maxBoundary &+ 1 // 0 var minBoundary = UInt32.min // Overflow subtraction wraps to the maximum value let wrappedSubtraction = minBoundary &- 1 // 4294967295 ``` ## Protocol Conformance Under the hood, `UInt32` is implemented as a struct. It conforms to a robust hierarchy of Swift standard library protocols, dictating its behavior and capabilities: * **`FixedWidthInteger` & `BinaryInteger`**: Provides bitwise operations, bit-shifting (`<<`, `>>`), and endianness conversions (`bigEndian`, `littleEndian`). * **`UnsignedInteger`**: Guarantees the type represents only non-negative values. * **`Numeric` & `Strideable`**: Enables standard arithmetic and allows the type to be used in ranges (e.g., `0..> 4 ```

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