How to Represent the Maximum Value of an Unsigned Integer in Go?

Unsigned Integer Maximum Value Representation in Go

In Go, the maximum value representable for an unsigned integer type can be obtained using a bitwise expression.

To initialize the variable minLen in the provided loop, where the minimum and maximum lengths are computed from a slice of structs, the maximum value for the unsigned integer type uint can be set as follows:

const MaxUint = ^uint(0)
var minLen uint = MaxUint

The ^ operator performs a bitwise NOT operation, effectively inverting all the bits of the zero value for a given type. In the case of an unsigned integer, this results in the maximum value representable for that type.

The subsequent loop will iterate over the elements of the slice and update minLen and maxLen based on the length of each element. If no values are present, minLen is clamped to zero to ensure that it remains less than or equal to maxLen.

Range of Integer Types

Go provides various integer types with different bit widths, which determine the range of values they can represent. Here are the ranges for common integer types:

• uint8: 0 to 255
• uint16: 0 to 65535
• uint32: 0 to 4294967295
• uint64: 0 to 18446744073709551615
• int8: -128 to 127
• int16: -32768 to 32767
• int32: -2147483648 to 2147483647
• int64: -9223372036854775808 to 9223372036854775807

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