How can I search for a substring in a string using Go?

How can I search for a substring in a string using Go?

You can use the strings.Contains function from the strings package to check if a substring exists in a string.

Can you show me a code example?

Sure! Here's a simple example:

package main

import (
    "fmt"
    "strings"
)

func main() {
    str := "Hello, world!"
    substr := "world"
    if strings.Contains(str, substr) {
        fmt.Println("Substring found!")
    } else {
        fmt.Println("Substring not found.")
    }
}

What if I want to find the index of the substring?

You can use strings.Index to find the index of the first occurrence of the substring. It returns -1 if not found.

Thanks! Is there a way to count occurrences of a substring?

Yes, you can use a loop with strings.Index to count occurrences by iterating through the string.