How to get the string length in go language

Getting method: 1. Use bytes.Count() to get the length, syntax "bytes.Count([]byte(str), sep))"; 2. Use strings.Count() to get the length, syntax "strings.Count(str, substr)"; 3. Use len() to get the length, the syntax is "len([]rune(str))"; 4. Use utf8.RuneCountInString() to get the length.

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

There are four ways to get the length of a string in the Go language:

• Use bytes.Count()

• Use strings.Count()

• Use len()

• Use utf8.RuneCountInString()

Method 1: Use bytes.Count() to get the length

bytes.Count([]byte(str), sep))

Parameters	Description
str	The string to get the length.
sep	separator, usually nil is passed.

Return value:

• Return the string length.

Instructions:

• We need to convert the string into a byte array and pass it into the bytes.Count function. The second parameter is the delimiter. symbol, just pass in nil.

Example:

package main
import (
	"bytes"
	"fmt"
)
func main() {
	//使用 bytes.Count() 获取字符串长度
	strHaiCoder := "(Hello, PHP中文网)"
	strCount := bytes.Count([]byte(strHaiCoder), nil)
	fmt.Println("strCount =", strCount)
}

Method 2: Use strings.Count( )Get length

strings.Count(str, substr)

Parameter	Description
str	The string to get the length.
substr	Substring, just pass in empty.

Return value:

• Return the string length.

Explanation:

• We directly pass the string into the strings.Count function. The second parameter is the substring. If you pass in empty Can.

Example:

package main
import (
	"fmt"
	"strings"
)
func main() {
	//使用 strings.Count() 获取字符串长度
	strHaiCoder := "(Hello, PHP中文网)"
	strCount := strings.Count(strHaiCoder, "")
	fmt.Println("strCount =", strCount)
}

Method 3: Use len() to obtain Length

len([]rune(str))

Parameters	Description
str	The string to get the length.

Return value:

• Return the string length.

Explanation:

• We need to force-convert the string into a rune array and pass it into the len function.

Example:

package main
import (
	"fmt"
)
func main() {
	//使用 len() 获取字符串长度
	strHaiCoder := "(Hello, PHP中文网)"
	strCount := len(strHaiCoder)
	strCount2 := len([]rune(strHaiCoder))
	fmt.Println("strCount =", strCount, "strCount2 =", strCount2)
}

##Method 4: Use utf8.RuneCountInString( )Get length

utf8.RuneCountInString(str)

ParameterDescriptionThe string to get the length.

str

Return value:

• Return the string length.

Note:

• We can use utf8.RuneCountInString() to get the string length.

Example:

package main
import (
	"fmt"
	"unicode/utf8"
)
func main() {
	//使用 utf8.RuneCountInString() 获取字符串长度
	strHaiCoder := "(Hello, PHP中文网)"
	strCount := utf8.RuneCountInString(strHaiCoder)
	fmt.Println("strCount =", strCount)
}

##[Related recommendations:

Go video tutorial

, Programming Teaching】

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