Let’s talk about conversion operations between integer types in Go language

There are many integer types in Go language, including int, int8, int16, int32, int64, uint, uint8, uint16, uint32 and uint64, etc. These types occupy different numbers of bytes and have their own characteristics and limitations in operation and storage. When we need to convert integers of different types, the Go language provides cast operators.

The syntax of the forced type conversion operator is as follows:

T(v)

Among them, T represents the target type, and v represents the value that needs to be converted. If the type of v is the same as the type of T, the conversion operation will not work. If the type of v is different from the type of T, v will be converted to a value of type T.

The following are some common integer type conversion examples:

package main

import (
    "fmt"
)

func main() {
    var i int32 = 100
    var j int64 = int64(i) // 将int32类型的i转换为int64类型的j
    var k uint = uint(j) // 将int64类型的j转换为uint类型的k
    fmt.Println(i, j, k)
}

Output:

100 100 100

In this example, we define a variable i of type int32 and initialize it as 100. Then, we cast i to type int64 and assign it to variable j, and finally cast j to variable k of type uint. The final output result is 100 100 100, indicating that the conversion operation is successful.

It should be noted that when we convert between different types, we need to pay attention to the range and precision of the data type. If the value range of the target type is smaller than the original type, some data will be lost during conversion, which will affect arithmetic accuracy. Therefore, when performing type conversion, you need to carefully consider the range and accuracy of the data and make a choice based on the actual scenario.

Although the cast operator is very convenient in the Go language, we still need to pay attention to the safety and correctness when using the operator to avoid serious errors and hidden dangers in the program.

In general, converting between integer types in the Go language is very simple. You only need to use the cast operator to convert a value from one type to another. Therefore, if we need to convert between integer types in a program, we can simplify the code and improve the efficiency of the program by introducing a cast operator.

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