# Level Up Your JavaScript Skills with These Coding Exercises Get Your Free PDF Guide Here Learn JavaScript

🚀 Level Up Your JavaScript Skills with These Coding Exercises 🚀

Calling all JavaScript learners and enthusiasts! 💡 Let’s dive into some coding exercises that will strengthen your problem-solving abilities and JavaScript skills. Here are five challenges to tackle:

1. Calculate the Factorial: Write a function to calculate the factorial of a given number. 🧮
2. Find the Largest Element: Create a function that finds the largest element in an array of numbers. 📊
3. Reverse a String: Challenge yourself to reverse a string effectively. 🔄
4. Check for Palindrome: Build a function to check if a string is a palindrome, ignoring spaces and punctuation. 🌟
5. Find the Missing Number: Write a function to find the missing number in an array of consecutive integers. 🔍

These exercises cover a range of problem-solving scenarios and are excellent for honing your JavaScript skills. Whether you’re a beginner or an experienced coder, these challenges provide valuable practice. So, roll up your sleeves, give them a try, and watch your JavaScript expertise grow! 💻🔥 #JavaScript #CodingExercises #Programming #ProblemSolving #TechSkills #JavaScriptLearners

# Exercise 1: Calculate the Factorial

Description: Write a JavaScript function to calculate the factorial of a given number.

function calculateFactorial(n) {

if (n === 0 || n === 1) {

return 1;

} else {

return n * calculateFactorial(n – 1);

}

}

// Example usage:

const result = calculateFactorial(5); // Returns 120

Summary: This function calculates the factorial of a number using recursion. It checks if the input is 0 or 1, in which case it returns 1. Otherwise, it recursively calls itself with a decreased value until it reaches 1.

# Exercise 2: Find the Largest Element

Description: Write a JavaScript function to find the largest element in an array of numbers.

function findLargestElement(arr) {

let largest = arr;

for (let i = 1; i < arr.length; i++) {

if (arr[i] > largest) {

largest = arr[i];

}

}

return largest;

}

// Example usage:

const numbers = [10, 5, 8, 20, 3];

const largestNumber = findLargestElement(numbers); // Returns 20

Summary: This function iterates through an array of numbers, comparing each element to the current largest element found so far. It returns the largest element.

# Exercise 3: Reverse a String

Description: Write a JavaScript function to reverse a given string.

function reverseString(str) {

return str.split(”).reverse().join(”);

}

// Example usage:

const originalString = ‘Hello, World!’;

const reversedString = reverseString(originalString); // Returns ‘!dlroW ,olleH’

Summary: This function splits the input string into an array of characters, reverses the order of elements in the array, and then joins them back into a string, effectively reversing the original string.

# Exercise 4: Check for Palindrome

Description: Write a JavaScript function to check if a given string is a palindrome.

function isPalindrome(str) {

const cleanedStr = str.toLowerCase().replace(/[^a-zA-Z0-9]/g, ”);

const reversedStr = cleanedStr.split(”).reverse().join(”);

return cleanedStr === reversedStr;

}

// Example usage:

const testString = ‘A man, a plan, a canal, Panama’;

const isPalindromeResult = isPalindrome(testString); // Returns true

Summary: This function removes non-alphanumeric characters, converts the input string to lowercase, and checks if it reads the same forwards and backwards by comparing it to its reverse.

# Exercise 5: Find the Missing Number

Description: Write a JavaScript function to find the missing number in an array of consecutive integers.

function findMissingNumber(arr) {

const n = arr.length + 1;

const expectedSum = (n * (n + 1)) / 2;

const actualSum = arr.reduce((acc, num) => acc + num, 0);

return expectedSum – actualSum;

}

// Example usage:

const numbers = [1, 2, 3, 5, 6, 7];

const missingNumber = findMissingNumber(numbers); // Returns 4

Summary: This function calculates the expected sum of consecutive integers up to the length of the array and subtracts the actual sum of the array elements to find the missing number.