Go中的Println vs Printf vs Print [英] Println vs Printf vs Print in Go

问题描述

我来自JS领域，经常使用console.log或console.error

I come from a land of JS and have mostly used things like console.log or console.error

现在，我正在关注的教程中，那里的讲师做了类似的事情

Now, the tutorial I am following, the instructor over there did something like this

package main

import "fmt"



func main() {

    var FirstName = "Varun"
    var lastName = "bindal"

    fmt.Println(FirstName, lastName)
    fmt.Printf("%T", FirstName)
}

在这里，他做了PrintF而不是Println来检查类型.最初，我认为println在新行中打印，所以我更改了

Here he did PrintF to check type instead of Println. Initially, I thought that println prints in new Line so I changed my

fmt.Printf("%T", FirstName)

到

fmt.Println("%T", FirstName)

但此记录为%T Varun，而不是告诉我类型.

but this logged %T Varun instead of telling me the type.

我去了他们的网站来弄清楚，或者无法理解还是没有?无法找到它.

I went to their site to figure it out and was either unable to comprehend it or wasn't able to find it out.

谷歌搜索使我知道Go中有三种记录/打印方式

Googling lead me know that there are three ways to log/print in Go

1. Println
2. Printf
3. 打印

那么，如果有人打电话告诉他们三个之间的区别?

So, If someone call tell the difference between three of them?

推荐答案

就像Nate所说的那样:fmt.Print和fmt.Println打印原始字符串(fmt.Println追加换行符)

Just as Nate said: fmt.Print and fmt.Println print the raw string (fmt.Println appends a newline)

fmt.Printf不会打印新行，您必须使用\n将其添加到末尾.

fmt.Printf will not print a new line, you will have to add that to the end yourself with \n.

fmt.Printf的工作方式很简单，您提供一个包含某些符号的字符串，而其他参数替换这些符号.例如:

The way fmt.Printf works is simple, you supply a string that contains certain symbols, and the other arguments replace those symbols. For example:

fmt.Printf("%s is cool", "Bob") 

在这种情况下，%s代表字符串.就您而言，%T打印变量的类型.

In this case, %s represents a string. In your case, %T prints the type of a variable.

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