How to capitalize the first letter of a string in Go language

In the Go language, you can use the ToTitle() function of the strings package to capitalize the first letter of a string. This function can convert the first letter of a string to uppercase. The syntax is "strings.ToTitle(string) "; If it is a string containing Chinese characters, the first English character in the string will be modified.

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

During the development process, many times we need to convert the first letter of a string to uppercase. In the Go language, the function to convert the first letter of a string to uppercase is strings.ToTitle( ).

strings.ToTitle Returns a copy of the string with the first letter of each word in s changed to uppercase.

The syntax format of strings.ToTitle() function:

func ToTitle(s string) string

Parameters	Description
s	Original string.

Return value

• Convert the string s to uppercase and return it.

Example of using the strings.ToTitle() function:

Example 1: Convert the first letter to uppercase

package main
import (
	"fmt"
	"strings"
)
func main() {
	//使用 Strings.ToTitle() 函数，将字符串首字母转成大写
	strHaiCoder := "hello world"
	ToTitleStr := strings.ToTitle(strHaiCoder)
	fmt.Println("ToTitleStr =", ToTitleStr)
}

Analysis: We defined a string type variable strHaicoder, and then we used the strings.ToTitle() function of the string to convert the first letter of the variable strHaicoder to uppercase, and used the print() function Print the final converted result.

Example 2: Convert a string starting with Chinese

package main
import (
	"fmt"
	"strings"
)
func main() {
	//使用 Strings.ToTitle() 函数，转换中文开始的字符串
	strHaiCoder := "你好(helloworld)"
	ToTitleStr := strings.ToTitle(strHaiCoder)
	fmt.Println("ToTitleStr =", ToTitleStr)
}

Analysis:

• We defined a character The variable strHaicoder of string type is assigned the value "haiCoder". Then we use the ToTitle() function of the string to convert the first letter of the variable strHaicoder to uppercase, and use the print() function to print the final converted result. .

• Because the string strHaicoder starts with Chinese, the Chinese does not make any changes. The strings.ToTitle() function modifies the first English in the string, so the final output "Helloworld", h changed from lowercase to uppercase H.

Note:

In Go1.18, the Title methods of the strings and bytes standard library have been deprecated. (Deprecated).

【Related recommendations: Go video tutorial, Programming teaching】

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