How to convert int32 to int type in golang

The int32 and int types in Go language are both integer data types, but their representation ranges are different. In some projects, it is necessary to convert int32 to int type. The following is a detailed introduction to the method and precautions for converting int32 to int in Golang.

Why do you need to convert int32 to int

In Go language, a variable of type int32 occupies 4 bytes of space, and its value range is -2147483648 to 2147483647. The space occupied by int type variables is dynamically allocated according to the number of bits in the system. Generally, it occupies 4 bytes in a 32-bit operating system and 8 bytes in a 64-bit operating system.

In some projects, due to historical reasons and other factors, it may be necessary to convert variables that have been defined as int32 type into int type. At this time, you need to use the conversion method provided in the Go language.

Method of converting int32 to int

In Go language, the process of converting int32 to int is very simple. You only need to assign the variable of type int32 to the variable of type int. Can.

func main() {
    var a int32 = 100
    var b int = int(a)
    fmt.Println(b)
}

In the above code, variable a is first defined as int32 type, and its value is 100. Use a variable b of type int to receive the converted result of a. Use the fmt.Println function to output the value of b. The running result is:

100

It can be found that after converting a to int type, its value remains unchanged.

Notes

Although the process of converting int32 to int is so simple, there are still some matters that need to be paid attention to in actual development, which will be introduced in detail below.

1. Value range

Since the value ranges of int32 and int types are different, when converting int32 type variables to int type, pay attention to whether data overflow will occur. Condition. If the variable value of type int32 exceeds the value range of type int, precision loss will occur during conversion, resulting in incorrect conversion results.

2. Size under different operating systems

In different operating systems, the size of the int type is different. In a 32-bit operating system, the int type occupies 4 bytes; in a 64-bit operating system, the int type can occupy up to 8 bytes.

Therefore, when converting a variable of type int32 to type int, you need to consider the factors of the development platform. If a compilation error occurs when converting a variable of type int32 to type int, you can try replacing the int type with an int32 type.

3. Precision of value

When converting a variable of type int32 to type int, you need to pay attention to whether the precision of the value will be lost. Because the value of type int32 occupies 4 bytes, and the value of type int is determined by the number of system bits.

When converting a variable of type int32 to type int, if the value of type int is smaller than the value of type int32, then the precision of the value will be lost. Therefore, when converting, it is necessary to ensure that the accuracy of the converted value does not change.

Summary

In the Go language, the int32 type and the int type are both integer data types, and their representation ranges are different. In some projects, it is necessary to convert int32 type variables into int type variables. In this case, you can use the conversion method provided in the Go language.

In the process of converting a variable of type int32 to type int, you need to pay attention to issues such as value range, size under different operating systems, and value precision. Only by following the correct method for conversion can the correctness of the conversion results be guaranteed.

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