A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each of the words consists of only uppercase and lowercase English letters (no punctuation).

• For example, "Hello World", "HELLO", and "hello world hello world" are all sentences.

You are given a sentence s​​​​​​ and an integer k​​​​​​. You want to truncate s​​​​​​ such that it contains only the first k​​​​​​ words. Return s​​​​​​ after truncating it.

LeetCode Problem - 1816

class Solution {
    public String truncateSentence(String s, int k) {
        // Split the input sentence into an array of words
        String[] array = s.split(" ");
        // Create a StringBuilder to build the truncated sentence
        StringBuilder sb = new StringBuilder();
        // Iterate through the words up to k
        for (int i = 0; i < k; i++) {
            // Append each word to the StringBuilder
            if (i != k - 1) {
                sb.append(array[i]).append(" ");
            } else {
                sb.append(array[i]);
            }
        }
        // Convert the StringBuilder to a string and return
        return sb.toString();
    }
}