Use the log.Println function to print log information to the console

Use the log.Println function to print log information to the console

The log is an important tool used to record program running status and debugging information. During the development process, we often need to output some print information in the program for easy viewing and analysis. The log package in the Go language standard library provides a series of functions for printing logs, among which the log.Println function can print log information to the console.

Let’s take a look at how to use the log.Println function to print log information.

First, we need to import the log package:

import "log"

Next, we can use the log.Println function in the program to print log information. Logs printed using the log.Println function will automatically add timestamps and newlines and output them to the console.

log.Println("这是一条日志信息")

The following is a simple example program that shows how to use the log.Println function to print log information to the console:

package main

import "log"

func main() {
    log.Println("程序开始运行")

    // 一些程序逻辑...

    log.Println("中间信息1")

    // 更多程序逻辑...

    log.Println("中间信息2")

    // 更多程序逻辑...

    log.Println("程序结束运行")
}

The above program will run at the beginning of the program, in the middle stage, and at the end of the program. When running, the corresponding log information is printed to the console.

In addition to the log.Println function, the log package also provides some other related functions, such as log.Printf can use formatted strings to output log information, log.Fatalf can output error information and terminate program running, etc. . For specific usage of these functions, please refer to the official documentation.

To summarize, using the log.Println function can conveniently output log information to the console, which is very helpful for program development and debugging. In actual development, we can use different log functions as needed to meet specific log printing needs.

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