What is the input function in go language

Go language input functions: 1. Scan() function, which can read multiple variables from the terminal, using spaces or newlines as separators, and the syntax is "fmt.Scan (address list)". 2. Scanln() function can read multiple variables from the terminal, using spaces as separators, and the syntax is "fmt.Scanln (address list)". 3. The Scanf() function can read the content input by the terminal in a formatted form, the syntax is "fmt.Scanf("formatted string", address list)".

The operating environment of this tutorial: Windows 7 system, GO version 1.18, Dell G3 computer.

Input function in go language

• fmt.Scan()

• fmt.Scanln()

• fmt.Scanf()

##First type: fmt.Scan (Address list)

Read multiple variables from the terminal, with spaces or newlines as delimiters.

Parameters are passed in to the address list. Spaces or line breaks can be used between input variables

func testScan() {
    var (
        a int
        b bool
    )
    // 这里在终端输入一个整数后，输入空格或者回车就可以继续输入第二个变量，然后按回车就会输入 a b 变量
    fmt.Scan(&a, &b)
    fmt.Println(a)
    fmt.Println(b)
}

The second type: fmt.Scanln (address list)

The difference from Scan is that it With line breaks, line breaks cannot be used between input variables, otherwise the input will be completed. [Related recommendations:

Go video tutorial, Programming teaching]

The terminal reads multiple variables, using spaces as separators

func testScanln() {
    var (
        a, b string
        c    int
        d    float32
    )
    // 从终端输入一个变量后输入空格再次输入第二个变量依此输入其它变量
    fmt.Scanln(&a, &b, &c, &d)
    fmt.Println(a)
    fmt.Println(b)
    fmt.Println(c)
    fmt.Println(d)
}

Third type:fmt.Scanf("formatted string", address list)

Read the content input by the terminal in formatted form

func testScanf() {
    var a int
    var b string
    // 这里是以空格作为分隔符，除了占位符外，其它的字符我们在终端输入的时候要原样输入
    fmt.Scanf("%d %s", &a, &b)
    fmt.Println(a, b)
}

Usage of scanf, scan, and scanln functions

package main

import (
    "fmt"
    "strconv"
)

//从终端获取用户的输入内容

func main() {
var (
    name    string
    age     int
)
fmt.Scan(&name, &age)
//fmt.Scanln(&name,&age)
//fmt.Scanf("name:%s age:%d\n",&name,&age)  //严格按照输出格式进行输出
    d := strconv.Itoa(age)  //数字转换为字符串
    fmt.Println("我的名字叫"+name,"今年"+d+"岁啦")

}

Scan demonstration results:

Scanln results ：

Scanf results:

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