在Go語言中，fmt.Println()和fmt.Printf()是打印文本到控制臺的兩個常用函數(shù)。 1. fmt.Println()適用於快速簡單的輸出，自動添加空格和換行符，適合基礎日誌或調(diào)試；2. fmt.Printf()提供完整的格式化控制，通過格式動詞如%s、%d、%.2f等插入變量並精確格式化輸出，適合需要格式規(guī)範的場景。兩者根據(jù)需求選擇使用。

In Go, printing text to the console is straightforward thanks to the fmt package. The two most commonly used functions for outputting text are fmt.Println() and fmt.Printf() . While both do the job of displaying content, they're used in slightly different scenarios.

fmt.Println(): Quick and Simple Output

If you just want to print a line of text or values separated by spaces and automatically followed by a newline, fmt.Println() is your go-to function.

It works well for basic logging or debugging. Here's how it looks:

 package main

import "fmt"

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

This will output:

 Hello, world!

You can also print multiple values at once:

 fmt.Println("The result is:", 42)

Output:

 The result is: 42

Note that fmt.Println() adds a space between arguments and a newline at the end automatically. If you don't want that behavior — say, you want more control over formatting — then read on.

fmt.Printf(): Full Control Over Output Format

When you need to format your output precisely — like inserting variables into a sentence or controlling number precision — use fmt.Printf() .

It uses format verbs (like %v , %d , %s ) to indicate where and how values should be inserted. For example:

 name := "Alice"
age := 30
fmt.Printf("Name: %s, Age: %d\n", name, age)

Output:

 Name: Alice, Age: 30

Some common format verbs:

• %v – prints the default representation of any value
• %s – for strings
• %d – for integers
• %f – for floating-point numbers
• %.2f – limits float to two decimal places

Here's another example:

 price := 19.99
fmt.Printf("Price: $%.2f\n", price)

Output:

 Price: $19.99

Which One Should You Use?

• ? Use fmt.Println() when you want fast, simple output without worrying about formatting.
• ? Use fmt.Printf() when you need clean, formatted output with placeholders.

Both are useful depending on context — logging, debugging, user feedback, etc.

基本上就這些。

以上是如何在GO中使用fmt.println（）或fmt.printf（）輸出文本？的詳細內(nèi)容。更多資訊請關注PHP中文網(wǎng)其他相關文章！