How do you find the index of a character within a string in Go?

Searching for Character Index in Go

When tasked with locating a specific character within a string in Go, one might initially consider using indexing techniques similar to Python. However, in Go, a distinct approach is employed.

The Index function, provided by the strings package, offers a solution to finding the index of a character within a string. This function returns the position of the first occurrence of the specified character, or -1 if the character cannot be found.

A sample code snippet demonstrates the use of Index:

import "fmt"
import "strings"

func main() {
    x := "chars@arefun"

    i := strings.Index(x, "@")
    fmt.Println("Index: ", i)  // Output: "5"

    if i >= 0 {
        chars := x[:i]   
        arefun := x[i+1:]
        
        fmt.Println(chars)  // Output: "chars"
        fmt.Println(arefun) // Output: "arefun"
    } else {
        fmt.Println("Index not found")
    }
}

Using Index, we can precisely find character indices within strings, which enables a range of text processing operations.

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