How is string data processed and managed in Go?

In the Go language, strings are represented by the string type, which is an immutable sequence of bytes in UTF-8 encoding. Key features and approaches to working with strings:

• Immutability: strings cannot be changed after creation. To modify, new strings must be created.
• Working with Unicode: since strings are in UTF-8, the rune type is used for working with characters (runes).
• Concatenation: strings can be combined using the + operator.
• Conversion to byte slices or rune slices: for manipulating individual characters or bytes.
• strings package: contains many functions for searching, replacing, splitting, and other string operations.

Example of string processing in Go:

package main

import (
    "fmt"
    "strings"
)

func main() {
    s := "Привет, мир"
    fmt.Println("String length in bytes:", len(s))

    // Convert to rune slice for counting characters
    runes := []rune(s)
    fmt.Println("Number of characters:", len(runes))

    // Check for substring
    if strings.Contains(s, "мир") {
        fmt.Println("String contains 'мир'")
    }

    // Replace substring
    newStr := strings.ReplaceAll(s, "мир", "Go")
    fmt.Println(newStr)
}