How to convert uppercase to lowercase in go language

The method of converting uppercase to lowercase in Go language: first create a go sample file; then define a string type variable; then use the ToLower function to convert all uppercase variable characters to lowercase; and finally use the print function to print The converted result is enough.

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

Go language string uppercase to lowercase conversion

During the development process, many times we need to convert all uppercase forms of a string into lowercase requirements. In Go In the language, the function used to convert the uppercase characters of a string to lowercase is strings.ToLower().

strings.ToLower() function

Syntax

func ToLower(s string) string

Parameters

Parameter s, original string.

Return value, convert the string s to lowercase and return it.

Case

Convert the string to lowercase

Use the ToLower() function to convert the string to lowercase

package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println("嗨客网(www.haicoder.net)")
//使用 ToLower() 函数，将字符串转成小写
strHaiCoder := "Study Golang From HaiCoder"
lowerStr := strings.ToLower(strHaiCoder)
fmt.Println("lowerStr =", lowerStr)
}

After the program runs, the console output is as follows:

First, we define a string type variable strHaicoder, and then we use the ToLower of the string () function converts all characters in the variable strHaicoder to lowercase, and uses the print() function to print the final converted result.

Strings are originally all lowercase

Use the ToLower() function to convert the string into lowercase

package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println("嗨客网(www.haicoder.net)")
//使用 ToLower() 函数，将字符串转成小写
strHaiCoder := "study golang from haicoder"
lowerStr := strings.ToLower(strHaiCoder)
fmt.Println("lowerStr =", lowerStr)
}

After the program is run, the console output As follows:

First, we define a string type variable strHaicoder, and then we use the ToLower() function of the string to convert all the characters in the variable strHaicoder to lowercase. And use the print() function to print the final converted result.

Because all the characters in the string strHaicoder are originally all lowercase, no conversion is done here.

Convert a string containing Chinese

Use the ToLower() function to convert a string containing Chinese

package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println("嗨客网(www.haicoder.net)")
//使用 ToLower() 函数，转换包含中文的字符串
strHaiCoder := "嗨客网(HaiCoder)"
lowerStr := strings.ToLower(strHaiCoder)
fmt.Println("lowerStr =", lowerStr)
}

After the program is run, the console output As follows:

First, we define a string type variable strHaicoder and assign it to "HaiCoder", then we use the string's ToLower( ) function converts the variable strHaicoder to lowercase, and uses the print() function to print the final converted result.

Because the string strHaicoder contains Chinese, the Chinese has not been changed in any way, and all English uppercase letters in it have been converted to lowercase, so "haicoder" is finally output.

Go language string uppercase to lowercase summary

In the Go language, the function used to convert the uppercase characters of a string to lowercase is ToLower(). Go language ToLower() function syntax:

func ToLower(s string) string

Recommended: "golang tutorial"

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