想要获取文本(内容)的开始和结束索引

text = "Hello, world!"
substring = "world"

start_index = text.find(substring)
end_index = start_index + len(substring) - 1 if start_index != -1 else -1

print(f"Start index: {start_index}, End index: {end_index}")

const text = "Hello, world!";
const substring = "world";

const start_index = text.indexOf(substring);
const end_index = start_index + substring.length - 1;

console.log(`Start index: ${start_index}, End index: ${end_index}`);

public class Main {
    public static void main(String[] args) {
        String text = "Hello, world!";
        String substring = "world";

        int start_index = text.indexOf(substring);
        int end_index = start_index + substring.length() - 1;

        System.out.println("Start index: " + start_index + ", End index: " + end_index);
    }
}

using System;

class Program {
    static void Main() {
        string text = "Hello, world!";
        string substring = "world";

        int start_index = text.IndexOf(substring);
        int end_index = start_index + substring.Length - 1;

        Console.WriteLine("Start index: " + start_index + ", End index: " + end_index);
    }
}