search
HomeBackend DevelopmentGolangInteresting Control Flow in the circle

Interesting Control Flow in the circle

in Go (Golang), control flow is managed using several fundamental constructs, including conditionals (if, else), loops (for), and switch statements. Here's an overview of how these constructs work in Go:

  1. Conditionals: if, else, else if In Go, if statements are used to execute code based on a condition. Unlike some other languages, Go doesn't require parentheses around the condition. However, the curly braces {} are mandatory.

Basic Statement

package main

import "fmt"

func main() {
    age := 20

    if age >= 18 {
        fmt.Println("You are an adult.")
    }
}

'if-else statement' Example
`package main

import "fmt"

func main() {
age := 16

if age >= 18 {
    fmt.Println("You are an adult.")
} else {
    fmt.Println("You are not an adult.")
}

}
`
'if-else if-else' Statement:

package main

import "fmt"

func main() {
    age := 20

    if age >= 21 {
        fmt.Println("You can drink alcohol.")
    } else if age >= 18 {
        fmt.Println("You are an adult, but cannot drink alcohol.")
    } else {
        fmt.Println("You are not an adult.")
    }
}

2.Loops: for
Go uses the 'for' loop for all looping needs; it does not have a 'while' or loop
basic 'for' loop:

package main

import "fmt"

func main() {
    for i := 0; i 



<p>'for' as a 'while' loop:<br>
</p>

<pre class="brush:php;toolbar:false">package main

import "fmt"

func main() {
    i := 0
    for i 



<p>Infinite Loop:<br>
</p>

<pre class="brush:php;toolbar:false">package main

func main() {
    for {
        // This loop will run forever
    }
}

'for' loop with 'range':
This is often used to iterate over slices,arrays,maps or strings.

package main

import "fmt"

func main() {
    numbers := []int{1, 2, 3, 4, 5}

    for index, value := range numbers {
        fmt.Println("Index:", index, "Value:", value)
    }
}

  1. Switch Statement Go The 'Switch' statement in Go is used to select one of many code blocks to be executed.Go 'switch'is more powerful than in some other languages and can be used with any type of value, not just integers.

Basic 'switch'

package main

import "fmt"

func main() {
    day := "Monday"

    switch day {
    case "Monday":
        fmt.Println("Start of the work week.")
    case "Friday":
        fmt.Println("End of the work week.")
    default:
        fmt.Println("Midweek.")
    }
}

Switch with multiple expressions in a case:

package main

import "fmt"

func main() {
    day := "Saturday"

    switch day {
    case "Saturday", "Sunday":
        fmt.Println("Weekend!")
    default:
        fmt.Println("Weekday.")
    }
}

A switch with no expression acts like a chain of if-else statements.

package main

import "fmt"

func main() {
    age := 18

    switch {
    case age = 18 && age 



<ol>
<li>Defer, panic and recover
</li>
</ol>

<pre class="brush:php;toolbar:false">package main

import "fmt"

func main() {
    defer fmt.Println("This is deferred and will run at the end.")
    fmt.Println("This will run first.")
}

Panic And Recover

package main

import "fmt"

func main() {
    defer func() {
        if r := recover(); r != nil {
            fmt.Println("Recovered from panic:", r)
        }
    }()

    fmt.Println("About to panic!")
    panic("Something went wrong.")
}

The above is the detailed content of Interesting Control Flow in the circle. 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
Go language pack import: What is the difference between underscore and without underscore?Go language pack import: What is the difference between underscore and without underscore?Mar 03, 2025 pm 05:17 PM

This article explains Go's package import mechanisms: named imports (e.g., import "fmt") and blank imports (e.g., import _ "fmt"). Named imports make package contents accessible, while blank imports only execute t

How to implement short-term information transfer between pages in the Beego framework?How to implement short-term information transfer between pages in the Beego framework?Mar 03, 2025 pm 05:22 PM

This article explains Beego's NewFlash() function for inter-page data transfer in web applications. It focuses on using NewFlash() to display temporary messages (success, error, warning) between controllers, leveraging the session mechanism. Limita

How to convert MySQL query result List into a custom structure slice in Go language?How to convert MySQL query result List into a custom structure slice in Go language?Mar 03, 2025 pm 05:18 PM

This article details efficient conversion of MySQL query results into Go struct slices. It emphasizes using database/sql's Scan method for optimal performance, avoiding manual parsing. Best practices for struct field mapping using db tags and robus

How can I define custom type constraints for generics in Go?How can I define custom type constraints for generics in Go?Mar 10, 2025 pm 03:20 PM

This article explores Go's custom type constraints for generics. It details how interfaces define minimum type requirements for generic functions, improving type safety and code reusability. The article also discusses limitations and best practices

How do I write mock objects and stubs for testing in Go?How do I write mock objects and stubs for testing in Go?Mar 10, 2025 pm 05:38 PM

This article demonstrates creating mocks and stubs in Go for unit testing. It emphasizes using interfaces, provides examples of mock implementations, and discusses best practices like keeping mocks focused and using assertion libraries. The articl

How to write files in Go language conveniently?How to write files in Go language conveniently?Mar 03, 2025 pm 05:15 PM

This article details efficient file writing in Go, comparing os.WriteFile (suitable for small files) with os.OpenFile and buffered writes (optimal for large files). It emphasizes robust error handling, using defer, and checking for specific errors.

How do you write unit tests in Go?How do you write unit tests in Go?Mar 21, 2025 pm 06:34 PM

The article discusses writing unit tests in Go, covering best practices, mocking techniques, and tools for efficient test management.

How can I use tracing tools to understand the execution flow of my Go applications?How can I use tracing tools to understand the execution flow of my Go applications?Mar 10, 2025 pm 05:36 PM

This article explores using tracing tools to analyze Go application execution flow. It discusses manual and automatic instrumentation techniques, comparing tools like Jaeger, Zipkin, and OpenTelemetry, and highlighting effective data visualization

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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools