如何检查接收到的字符串中的特定单词？

def check_word_in_string(text, word):
    if word in text:
        return True
    else:
        return False

# 使用示例
text = "Hello, this is a test string."
word_to_check = "test"
result = check_word_in_string(text, word_to_check)
print(f"The word '{word_to_check}' is in the string: {result}")

function checkWordInString(text, word) {
    return text.includes(word);
}

// 使用示例
let text = "Hello, this is a test string.";
let wordToCheck = "test";
let result = checkWordInString(text, wordToCheck);
console.log(`The word '${wordToCheck}' is in the string: ${result}`);

public class WordChecker {
    public static boolean checkWordInString(String text, String word) {
        return text.contains(word);
    }

    public static void main(String[] args) {
        String text = "Hello, this is a test string.";
        String wordToCheck = "test";
        boolean result = checkWordInString(text, wordToCheck);
        System.out.println("The word '" + wordToCheck + "' is in the string: " + result);
    }
}

using System;

class Program {
    static bool CheckWordInString(string text, string word) {
        return text.Contains(word);
    }

    static void Main() {
        string text = "Hello, this is a test string.";
        string wordToCheck = "test";
        bool result = CheckWordInString(text, wordToCheck);
        Console.WriteLine("The word '" + wordToCheck + "' is in the string: " + result);
    }
}