Learn the basics of Go language input functions from scratch

Learn the basics of Go language input functions from scratch

Go language is a statically typed, compiled, and concurrent programming language developed by Google. It has concise syntax, efficient concurrency model and excellent performance, so it is favored by developers. In the process of learning Go language, understanding input functions is one of the most important basic knowledge. This article will start from scratch, introduce the basic knowledge of Go language input functions, and give specific code examples.

1. fmt package

In the Go language, the fmt package is a standard package for formatting input and output. We can use functions in the fmt package for input and output operations. Among them, the most commonly used functions in the fmt package are fmt.Scan and fmt.Println.

Example 1:

package main

import "fmt"

func main() {
    var name string
    fmt.Println("请输入您的姓名：")
    fmt.Scan(&name)
    fmt.Println("您好，", name)
}

2. bufio package

In addition to the fmt package, the Go language also provides the bufio package for efficient reading enter. The functions in the bufio package can implement cache-based read operations, which can improve the efficiency of reading large amounts of data.

Example 2:

package main

import (
    "bufio"
    "os"
    "fmt"
)

func main() {
    reader := bufio.NewReader(os.Stdin)

    fmt.Println("请输入您的年龄：")

    age, _ := reader.ReadString('
')

    fmt.Println("您的年龄是：", age)
}

3. Use the flag package to receive command line parameters

In actual development, we often need to enter some parameters from the command line Parameters so that the program can dynamically perform corresponding operations. The flag package in Go provides a convenient way to parse command line parameters.

Example 3:

package main

import (
    "flag"
    "fmt"
)

func main() {
    name := flag.String("name", "", "请输入您的姓名")
    age := flag.Int("age", 0, "请输入您的年龄")

    flag.Parse()

    fmt.Println("您的姓名是：", *name)
    fmt.Println("您的年龄是：", *age)
}

The above is the basic knowledge of learning the Go language input function from scratch, and provides specific code examples. I hope this article will help you learn the Go language.

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