88 Functions Assignment in JAVASCRIPT

1. Write a function isEven that takes a number as an argument and returns true if the number is even and false if it is odd.

2. Create a function countVowels that takes a string and returns the number of vowels in that string.

3. Write a function reverseString that takes a string and returns it reversed (e.g., "hello" becomes "olleh").

4. Create a function findMax that takes an array of numbers and returns the largest number.

5. Write a function isPalindrome that checks if a given string is a palindrome (reads the same backward as forward).

6. Create a function fibonacci that returns the nth Fibonacci number.

7. Write a function factorial that calculates the factorial of a given number.

8. Create a function removeDuplicates that takes an array and returns a new array without duplicates.

9. Write a function sumArray that takes an array of numbers and returns the sum.

10. Create a function sortArray that takes an array of numbers and returns it sorted in ascending order.

11. Write a function stringLength that returns the length of a given string.

12. Create a function toUpperCase that takes a string and returns it in uppercase.

13. Write a function capitalizeFirstLetter that capitalizes the first letter of each word in a string.

14. Create a function mergeArrays that takes two arrays and merges them into one.

15. Write a function isPrime that checks if a number is prime.

16. Create a function countWords that counts the number of words in a string.

17. Write a function arrayContains that checks if an array contains a specific value.

18. Create a function uniqueElements that returns an array of unique elements from a given array.

19. Write a function flattenArray that flattens a nested array.

20. Create a function repeatString that takes a string and a number, and returns the string repeated that many times.

21. Write a function getRandomInt that returns a random integer between two numbers.

22. Create a function average that calculates the average of an array of numbers.

23. Write a function removeSpaces that removes all spaces from a string.

24. Create a function difference that returns the difference between the largest and smallest numbers in an array.

25. Write a function shuffledArray that takes an array and returns it shuffled randomly.

26. Create a function longestWord that returns the longest word in a string.

27. Write a function countDown that takes a number and counts down to zero, logging each number.

28. Create a function firstNonRepeatingChar that finds the first non-repeating character in a string.

29. Write a function toTitleCase that converts a string to title case.

30. Create a function removeElement that removes a specified element from an array.

31. Write a function swap that swaps the values of two variables.

32. Create a function countOccurrences that counts how many times a specific value appears in an array.

33. Write a function mostFrequent that finds the most frequently occurring element in an array.

34. Create a function combineStrings that concatenates two strings with a space in between.

35. Write a function randomColor that generates and returns a random RGB color.

36. Create a function sumOfDigits that returns the sum of the digits of a number.

37. Write a function findIndex that returns the index of a specific value in an array.

38. Create a function shuffleString that shuffles the characters of a string randomly.

39. Write a function secondLargest that finds the second largest number in an array.

40. Create a function stringToArray that converts a string to an array of words.

41. Write a function mergeSortedArrays that merges two sorted arrays into one sorted array.

42. Create a function sumPositiveNumbers that sums all positive numbers in an array.

43. Write a function extractDomain that extracts the domain from a URL.

44. Create a function sumEvenNumbers that sums all even numbers in an array.

45. Write a function getDayOfWeek that returns the day of the week for a given date.

46. Create a function largestEvenNumber that finds the largest even number in an array.

47. Write a function mergeObjects that merges two objects into one.

48. Create a function capitalizeFirstLetter that capitalizes the first letter of each word in a string.

49. Write a function randomInteger that generates a random integer between two given values.

50. Create a function uniqueArray that returns an array with duplicate values removed.

51. Write a function isAnagram that checks if two strings are anagrams of each other (e.g., "listen" and "silent").

52. Create a function removeVowels that takes a string and returns a new string with all vowels removed.

53. Write a function getAge that calculates the age of a person based on their birth year.

54. Create a function findMissingNumber that finds the missing number in a given array of consecutive integers.

55. Write a function countUppercase that counts the number of uppercase letters in a string.

56. Create a function validateEmail that checks if a given email address is valid.

57. Write a function toggleNavbar that shows or hides a navigation bar when a button is clicked.

58. Create a function submitForm that validates a form and submits it if all fields are filled correctly.

59. Write a function addToCart that adds an item to a shopping cart and updates the cart count.

60. Create a function searchProducts that searches for products in an array and returns matching results.

61. Write a function sortByPrice that sorts an array of products by their price.

62. Create a function highlightText that highlights specific keywords in a block of text.

63. Write a function validatePassword that checks if a password meets certain criteria (length, special characters, etc.).

64. Create a function scrollToTop that scrolls the page to the top smoothly when called.

65. Write a function updateProfilePicture that allows a user to upload a new profile picture.

66. Create a function validatePhoneNumber that checks if a phone number is valid based on a specified format.

67. Write a function getCurrentDateTime that returns the current date and time in a specified format.

68. Create a function generateRandomPassword that creates a random password based on user-defined criteria.

69. Write a function rotateArray that rotates an array to the right by a given number of steps.

70. Create a function comparePasswords that checks if two password fields match during registration.

71. Write a function isAdult that takes an age and returns true if the age is 18 or older, and false otherwise.

72. Create a function concatStrings that takes two strings and returns them concatenated together.

73. Write a function greetUser that takes a name and returns a greeting message (e.g., "Hello, [name]!").

74. Create a function squareNumber that takes a number and returns its square.

75. Write a function countChars that counts the number of characters in a string.

76. Create a function isString that checks if a given input is a string and returns true or false.

77. Write a function findMin that takes an array of numbers and returns the smallest number.

78. Create a function splitString that takes a string and returns an array of its characters.

79. Write a function removeLastElement that takes an array and returns a new array with the last element removed.

80. Create a function toggleCase that takes a string and toggles the case of each character.

81. Write a function countConsonants that takes a string and returns the number of consonants in that string.

82. Create a function removeWhitespace that removes all leading and trailing whitespace from a string.

83. Create a function highlightSubstring that highlights a specified substring within a string.

84. Write a function formatCurrency that takes a number and formats it as a currency string.

85. Create a function getElementById that takes an ID and returns the HTML element with that ID.

86. Write a function formatDate(date) that takes a date object and returns a formatted date string in the format YYYY-MM-DD.

87. Create a function resizeElement(elementId, width, height) that resizes the HTML element with the specified ID to the provided width and height.

88. Write a function that flattens a nested array into a single array.