What are the Maximum and Minimum Values of Integer Types in Go?

The Maximum and Minimum Values of Integer Types in Go

When working with integer data types in Go, it's essential to understand their maximum and minimum representable values. For signed integer types (int, int8, int16, etc.), the minimum and maximum values are determined by the number of bits used for each type.

Calculating Maximum and Minimum Values

To determine the maximum value for an unsigned integer type, you can use the "^uint(0)" expression. This operation performs a bitwise negation on the largest possible uint value, which effectively sets all bits to 1. For example, for a uint64 type:

const MaxUint64 = ^uint64(0) // 18446744073709551615

To determine the minimum value for a signed integer type, you can use a similar approach, except that you need to first convert the maximum value to an int type. For example, for a int32 type:

const MaxInt32 = int32(^uint32(0)) // 2147483647
const MinInt32 = -MaxInt32 - 1 // -2147483648

Initializing Variables with Maximum Value

In the code example you provided, you wanted to initialize the minLen variable with the maximum value for a uint type. Using the above techniques, you can write the following code:

var minLen uint = ^uint(0)

This will ensure that minLen is initialized to the largest possible uint value, so that the first iteration of the loop will corretamente compare its value to the thing.n.

The above is the detailed content of What are the Maximum and Minimum Values of Integer Types in Go?. For more information, please follow other related articles on the PHP Chinese website!