search
HomeBackend DevelopmentGolangGolang: Deep understanding of type conversion between integers

Integer type conversion in Go allows developers to convert values ​​between different integer types. Type conversions include type casting (using () syntax) and type assertion (using type assertion syntax to check the actual type of a value). In actual combat scenarios, type conversion is used in applications such as operating different types of integer variables and converting file sizes.

Golang: Deep understanding of type conversion between integers

Integer type conversion in Go

In the Go language, integer type conversion is a conversion between different integer types value process. It enables developers to manipulate data between different types of integer variables, providing code flexibility.

Type casting

There are two types of conversions in Go: type casting and type assertion. Type casting uses the () syntax to convert a value to another type. For example:

var a int32 = 10
var b int64 = int64(a) // 显式类型转换

With explicit type conversion, a is converted to b of type int64.

Type assertion

Type assertion uses the type assertion syntax to check the actual type of a value. It returns a Boolean value to indicate whether the conversion was successful and may return a converted value. For example:

var a interface{} = 10
b, ok := a.(int64) // 类型断言
if ok {
    fmt.Println("转换成功:", b)
}

With type assertion, the interface value a is checked to be b of type int64. If the conversion is successful, ok is true.

Practical case: read file size

The following is a practical case of reading file size, which shows the use of type conversion:

package main

import (
    "fmt"
    "os"
)

func main() {
    f, err := os.Stat("file.txt")
    if err != nil {
        fmt.Println(err)
        return
    }

    sizeInBytes := f.Size()
    sizeInMB := float64(sizeInBytes) / (1024 * 1024) // 转换成 MB

    fmt.Printf("文件大小:%.2f MB\n", sizeInMB)
}

In this case, type conversion is used to convert the file size from int64 (bytes) to float64 (megabytes) for display.

The above is the detailed content of Golang: Deep understanding of type conversion between integers. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
String Manipulation in Go: Mastering the 'strings' PackageString Manipulation in Go: Mastering the 'strings' PackageMay 14, 2025 am 12:19 AM

Mastering the strings package in Go language can improve text processing capabilities and development efficiency. 1) Use the Contains function to check substrings, 2) Use the Index function to find the substring position, 3) Join function efficiently splice string slices, 4) Replace function to replace substrings. Be careful to avoid common errors, such as not checking for empty strings and large string operation performance issues.

Go 'strings' package tips and tricksGo 'strings' package tips and tricksMay 14, 2025 am 12:18 AM

You should care about the strings package in Go because it simplifies string manipulation and makes the code clearer and more efficient. 1) Use strings.Join to efficiently splice strings; 2) Use strings.Fields to divide strings by blank characters; 3) Find substring positions through strings.Index and strings.LastIndex; 4) Use strings.ReplaceAll to replace strings; 5) Use strings.Builder to efficiently splice strings; 6) Always verify input to avoid unexpected results.

'strings' Package in Go: Your Go-To for String Operations'strings' Package in Go: Your Go-To for String OperationsMay 14, 2025 am 12:17 AM

ThestringspackageinGoisessentialforefficientstringmanipulation.1)Itofferssimpleyetpowerfulfunctionsfortaskslikecheckingsubstringsandjoiningstrings.2)IthandlesUnicodewell,withfunctionslikestrings.Fieldsforwhitespace-separatedvalues.3)Forperformance,st

Go bytes package vs strings package: Which should I use?Go bytes package vs strings package: Which should I use?May 14, 2025 am 12:12 AM

WhendecidingbetweenGo'sbytespackageandstringspackage,usebytes.Bufferforbinarydataandstrings.Builderforstringoperations.1)Usebytes.Bufferforworkingwithbyteslices,binarydata,appendingdifferentdatatypes,andwritingtoio.Writer.2)Usestrings.Builderforstrin

How to use the 'strings' package to manipulate strings in Go step by stepHow to use the 'strings' package to manipulate strings in Go step by stepMay 13, 2025 am 12:12 AM

Go's strings package provides a variety of string manipulation functions. 1) Use strings.Contains to check substrings. 2) Use strings.Split to split the string into substring slices. 3) Merge strings through strings.Join. 4) Use strings.TrimSpace or strings.Trim to remove blanks or specified characters at the beginning and end of a string. 5) Replace all specified substrings with strings.ReplaceAll. 6) Use strings.HasPrefix or strings.HasSuffix to check the prefix or suffix of the string.

Go strings package: how to improve my code?Go strings package: how to improve my code?May 13, 2025 am 12:10 AM

Using the Go language strings package can improve code quality. 1) Use strings.Join() to elegantly connect string arrays to avoid performance overhead. 2) Combine strings.Split() and strings.Contains() to process text and pay attention to case sensitivity issues. 3) Avoid abuse of strings.Replace() and consider using regular expressions for a large number of substitutions. 4) Use strings.Builder to improve the performance of frequently splicing strings.

What are the most useful functions in the GO bytes package?What are the most useful functions in the GO bytes package?May 13, 2025 am 12:09 AM

Go's bytes package provides a variety of practical functions to handle byte slicing. 1.bytes.Contains is used to check whether the byte slice contains a specific sequence. 2.bytes.Split is used to split byte slices into smallerpieces. 3.bytes.Join is used to concatenate multiple byte slices into one. 4.bytes.TrimSpace is used to remove the front and back blanks of byte slices. 5.bytes.Equal is used to compare whether two byte slices are equal. 6.bytes.Index is used to find the starting index of sub-slices in largerslices.

Mastering Binary Data Handling with Go's 'encoding/binary' Package: A Comprehensive GuideMastering Binary Data Handling with Go's 'encoding/binary' Package: A Comprehensive GuideMay 13, 2025 am 12:07 AM

Theencoding/binarypackageinGoisessentialbecauseitprovidesastandardizedwaytoreadandwritebinarydata,ensuringcross-platformcompatibilityandhandlingdifferentendianness.ItoffersfunctionslikeRead,Write,ReadUvarint,andWriteUvarintforprecisecontroloverbinary

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),