How to view golang

Golang (also known as Go language) is an increasingly popular programming language. Its main advantages include efficiency and reliability. In the process of using Golang, sometimes we need to view the information output by the code or program. This article will introduce the commonly used viewing methods in Golang.

1. Command line output

The most basic output in Golang is to use the fmt.Println() function in the command line to output the content to the console. For example:

package main

import "fmt"

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

Execute this program to get the following output:

Hello, world!

If you want to output variables and other content, you can use a format string similar to C language. For example:

package main

import "fmt"

func main() {
    a := 10
    b := 20
    fmt.Printf("a = %d, b = %d
", a, b)
}

Execute this program to get the following output:

a = 10, b = 20

2. Log output

In addition to command line output, Golang also provides the log package for outputting log information . Generally, using logging in a program can monitor the program execution process in a more targeted manner, making it easier to troubleshoot problems. The following is a sample code for log output:

package main

import (
    "log"
)

func main() {
    log.Println("this is a log message")
}

Execute this program to get the following output:

2022/01/01 00:00:00 this is a log message

3. Debug output

In addition to regular output and log output, debug output can Trace program execution in more detail. Debug output is typically used during program development and debugging phases, such as when debugging via the gdb or delve debugger. The following is a sample code for debugging output:

package main

import "fmt"

func main() {
    a := 10
    b := 20
    fmt.Printf("a = %d, b = %d
", a, b)
    // 下面是调试输出
    fmt.Printf("
Debug Information:
")
    fmt.Printf("a variable: %d
", a)
    fmt.Printf("b variable: %d
", b)
}

Execute this program to get the following output:

a = 10, b = 20

Debug Information:
a variable: 10
b variable: 20

4. IDE Tools

In addition to command line output, log output and debugging output In addition, you can also use IDE tools to view. Common Golang development tools include Visual Studio Code, GoLand, Sublime, Vim, Atom, Emacs, etc. These tools provide convenient code editing, code tracking and debugging functions.

Finally, let’s summarize Golang’s common output methods, which are:

1. Command line output: Use functions such as fmt.Println() to output content to the terminal.
2. Log output: Use the log package to output logs to a file or terminal.
3. Debug output: Use the fmt.Println() or fmt.Printf() function to output debugging information in the program.
4. IDE tool: Use the functions provided in the tool for output and viewing.

I hope this article can be helpful to your learning and development of Golang.

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