Notes

1.
function countWordsAndLetters(sentence) {
// Counting the number of words
const words = sentence.split(' ').filter(word => word !== ''); // Splitting the sentence into words and filtering out empty strings
const wordCount = words.length;

// Counting the number of letters
const letters = sentence.replace(/[^a-zA-Z]/g, ''); // Removing non-letter characters
const letterCount = letters.length;

return { wordCount, letterCount };
}

// Example sentence
const inputSentence = "This is an example sentence!";

const counts = countWordsAndLetters(inputSentence);
console.log("Number of words:", counts.wordCount);
console.log("Number of letters:", counts.letterCount);

2.

// Static array of 20 numbers
const numbersArray = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];

// Function to check if a specific integer exists in the array
function containsInteger(arr, num) {
return arr.includes(num); // Using the Array.includes() method to check if the number exists in the array
}

// Number to check existence in the array
const specificInteger = 4;

// Checking if the specific integer exists in the array
const isPresent = containsInteger(numbersArray, specificInteger);

if (isPresent) {
console.log(The array contains the integer ${specificInteger}.);
} else {
console.log(The array does not contain the integer ${specificInteger}.);
}


3.

function isLastCharA(word) {
// Check if the last character of the word is 'A'
const lastChar = word.charAt(word.length - 1);
return lastChar.toUpperCase() === 'A';
}

// Test with some example words
const wordsToCheck = ["Apple", "Banana", "Orange", "Table", "Chair"];

wordsToCheck.forEach(word => {
if (isLastCharA(word)) {
console.log(The last character of "${word}" is 'A'.);
} else {
console.log(The last character of "${word}" is not 'A'.);
}
});


4.

function WordConverter(words) {
return words.map(word => word.length);
}

// Example array of words
const arrayOfWords = ["hello", "world"];

const wordLengths = WordConverter(arrayOfWords);
console.log(wordLengths); // Output: [5, 5]