Let’s talk about golang’s type conversion operation

The Golang language is an efficient, simple, and safe programming language with a powerful type system and built-in concurrency support. Type conversion in the Golang language allows programmers to convert a value of one type into a value of another type, and the type conversion operation in the Golang language is safe and efficient.

In Golang language, type conversion is mainly divided into two types: static conversion and dynamic conversion.

Static conversion is also a type assertion in the Golang language, which is mainly used to convert an interface type variable into a specific type. Look at the following example:

var i interface{}
i = 1
// 将 i 转换为 int 类型
if v, ok := i.(int); ok {
    fmt.Println("i 的值是：", v)
}

The output result is:

i 的值是： 1

It can be seen that converting the interface type variable i into the int type variable v can be successful. This is static conversion. .

Dynamic conversion refers to converting a value of one type into a value of another type according to certain rules. For example, we can convert string to int type, or int type to string type, etc. Below we take the operation of converting a string to an int type as an example.

str := "1234"
i, err := strconv.Atoi(str)
if err != nil {
    fmt.Println(err)
}
fmt.Printf("字符串 %s 转换为整型后的值是 %d\n", str, i)

The output result is:

字符串 1234 转换为整型后的值是 1234

Dynamic conversion is mainly implemented through Golang’s built-in library. For example, the conversion between strings and numbers is implemented using the Atoi and Itoa functions of the strconv library.

When using Golang for dynamic conversion, you need to pay attention to some things. For example, you cannot convert a floating point number into an integer type because the converted integer type cannot represent the decimal part of the floating point type.

In general, the type conversion operation in the Golang language is very convenient, safe, and fast, which greatly improves programmers' writing efficiency. At the same time, dynamic conversion can also achieve many meaningful operations. Therefore, the Golang language's ability to perform type conversion should be deeply studied and explored.

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