Golang Getting Started Troubleshooting Tips: Novices can get started easily

Go Getting Started Guide: Download and install the Go binary package, and set the environment variables PATH and GOPATH. Create a hello.go file, containing a main function that outputs "Hello, world!". Go provides constants, variables and data types, such as int, float64, bool, and string. Conditional statements and loops: if is used for conditional judgment, for and range are used for loops. Practical case: Get the system time in the get_time.go file and output the timestamp and time string.

Tips for solving problems in getting started with Go: Beginners can get started easily

1. Install Go

• Download and install the Go binary package: https://go.dev/dl/

• Set environment variables (only need to be set once):

  export PATH=$PATH:/usr/local/go/bin
  export GOPATH=/my/go/path

2. Build your first Hello World

Create a hello.go file:

package main

import "fmt"

func main() {
    fmt.Println("Hello, world!")
}

Run the program:

go run hello.go

3. Understand Go constants, variables and data types

Constant:

const PI = 3.14

Variable:

var age int

Data type:

• Integer type (int, int8, int16, int32, int64)
• Floating point type ( float32, float64)
• Boolean type (bool)
• String type (string)

4. Use conditional statements and loops

Conditional statement:

if age >= 18 {
    fmt.Println("你可以投票了！")
} else {
    fmt.Println("你还不够资格投票。")
}

Loop:

• for loop

  for i := 0; i < 10; i++ {
    fmt.Println(i)
  }

• Range loop (applicable to slicing and mapping)

  for _, val := range numbers {
    fmt.Println(val)
  }

Practical case: Get the system time

Create a file named get_time.go File:

package main

import (
    "fmt"
    "time"
)

func main() {
    // 获取当前时间
    now := time.Now()

    // 输出时间戳
    fmt.Println("Unix 时间戳：", now.Unix())

    // 输出时间字符串
    fmt.Println("时间字符串：", now.Format("2006-01-02 15:04:05"))
}

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