Find the Longest Word in a String

Function to find the longest word in a given sentence:

You can create a JavaScript function to find the longest word in a given sentence by splitting the sentence into words and then iterating through each word to find the one with the maximum length. Here's how you can do it:

function longestWord(sentence) {
    // Split the sentence into words
    let words = sentence.split(/\s+/);
    
    // Initialize variables to store the longest word and its length
    let longest = "";
    let maxLength = 0;
    
    // Iterate through each word to find the longest one
    for (let i = 0; i < words.length; i++) {
        // Remove any punctuation from the word
        let word = words[i].replace(/[^\w\s]/g, '');
        
        // Check if the current word is longer than the current longest word
        if (word.length > maxLength) {
            longest = word;
            maxLength = word.length;
        }
    }
    
    return longest;
}

// Example usage
let sentence = "The quick brown fox jumps over the lazy dog.";
console.log("Longest word:", longestWord(sentence));

Longest word: quick

Explanation:

This function 'longestWord()' takes a sentence as input and returns the longest word in that sentence. It splits the sentence into words using a regular expression, removes any punctuation from each word, and then iterates through the words to find the longest one. Finally, it returns the longest word found.