How to convert int type to uint type in golang

In golang, int and uint are two common integer types. They often need to be converted when used. Especially when performing operations such as bit operations, certain type matching is required. How to convert the int type to What about uint type?

In golang, basically all type conversions require explicit conversion, and there is no automatic conversion function. The same is true for conversions between int and uint. Conversion between them can be achieved through cast.

The following are some examples of common int and uint type conversions in practice:

package main

import (
    "fmt"
)

func main() {
    // 将int类型转换为uint类型
    var i int = -10
    var ui uint = uint(i)
    fmt.Printf("i=%d, ui=%d\n", i, ui)

    // 将uint类型转换为int类型
    var ui2 uint = 4294967286 //uint最大表示值减一
    var i2 int = int(ui2)
    fmt.Printf("ui2=%d, i2=%d\n", ui2, i2)
}

Output results:

i=-10, ui=18446744073709551606
ui2=4294967286, i2=-10

We can find that when converting the int type to uint During the type process, the negative number is converted into the maximum value of the uint type minus the absolute value, and then adds 1. This is because uint is an unsigned integer type and cannot represent negative numbers. When converting uint type to int type, overflow may also occur. For example, when converting the maximum value of uint type to int type, a negative number will be obtained.

When converting between signed integer types and unsigned integer types, you need to pay attention to some issues. For example, in the uint type, a so-called "signed" integer may appear, that is, a Variables of type uint may have negative characteristics. In this case, strange results may occur when using int type to convert uint type, so it needs to be used with caution.

In short, the conversion between int type and uint type needs to be determined according to the specific situation. It is necessary to fully understand the characteristics and scope of the data type in order to avoid unnecessary errors.

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