Java Script - Assignments - Part 1

Java Script Assignments Part 1

 

1.       Write a program that declares two variables, assigns them each a number value, and then adds them together. Print the result to the console.

2.       Write a program that declares two variables, assigns them each a string value, and then concatenates them together. Print the result to the console.

3.       Write a program that declares a variable, assigns it a Boolean value, and then prints the opposite value to the console.

4.       Write a program that declares a variable, assigns it an array value containing several strings, and then prints the length of the array to the console.

5.       Write a program that declares a variable, assigns it an object value containing several key-value pairs, and then prints one of the values to the console.

6.       Write a program that declares two variables, assigns them each a number value, and then compares them using the greater than operator. Print the result to the console.

7.       Write a program that declares a variable, assigns it a string value, and then checks if it contains a specific substring using the includes method. Print the result to the console.

8.       Write a program that declares a variable, assigns it a number value, and then increments it using the increment operator. Print the result to the console.

9.       Write a program that declares a variable, assigns it an array value containing several numbers, and then uses a loop to print each element of the array to the console.

10.   Write a program that declares a variable, assigns it an object value containing several key-value pairs, and then uses a loop to print each key and value to the console.

11.   Write a program that prompts the user for a number, and then checks if it is even or odd. Print the result to the console.

12.   Write a program that prompts the user for a number, and then checks if it is positive or negative. Print the result to the console.

13.   Write a program that prompts the user for a string, and then checks if it contains the letter "a". Print the result to the console.

14.   Write a program that prompts the user for a number, and then prints all the even numbers up to that number to the console.

15.   Write a program that prompts the user for a number, and then prints all the odd numbers up to that number to the console.

16.   Write a program that prompts the user for a number, and then prints the factorial of that number to the console.

17.   Write a program that prompts the user for a number, and then checks if it is a prime number. Print the result to the console.

18.   Write a program that prompts the user for a number, and then prints the Fibonacci sequence up to that number to the console.

19.   Write a program that prompts the user for a string, and then prints each character of the string to the console using a for loop.

20.   Write a program that prompts the user for a number, and then prints a multiplication table for that number up to 10 to the console.

21.   Write a function that takes two numbers as parameters and returns their sum.

22.   Write a function that takes two strings as parameters and concatenates them together. Return the result.

23.   Write a function that takes a number as a parameter and returns true if it is even, and false otherwise.

24.   Write a function that takes a number as a parameter and returns true if it is a prime number, and false otherwise.

25.   Write a function that takes an array of numbers as a parameter and returns the largest number in the array.

26.   Write a function that takes an array of strings as a parameter and returns the longest string in the array.

27.   Write a function that takes a string as a parameter and returns a new string with all the vowels removed.

28.   Write a function that takes an array of numbers as a parameter and returns the sum of all the even numbers in the array.

29.   Write a function that takes a number as a parameter and returns the factorial of that number.

30.   Write a function that takes a number as a parameter and returns the Fibonacci sequence up to that number as an array.

31.   Write a program that creates an array containing several strings, and then prints each string to the console.

32.   Write a program that creates an array containing several numbers, and then prints the sum of all the numbers to the console.

33.   Write a program that creates an object representing a person, with properties for name, age, and gender. Print the object to the console.

34.   Write a program that creates an array of objects representing people, with properties for name, age, and gender. Print the array to the console.

35.   Write a program that creates an array containing several numbers, and then sorts the array in ascending order. Print the sorted array to the console.

36.   Write a program that creates an array containing several strings, and then sorts the array in alphabetical order. Print the sorted array to the console.

37.   Write a program that creates an object representing a car, with properties for make, model, and year. Add a method to the object that prints the make and model to the console.

38.   Write a program that creates an array of objects representing cars, with properties for make, model, and year. Add a method to each object that prints the make and model to the console.

39.   Write a program that creates an array of numbers, and then uses the map method to create a new array with each number multiplied by 2. Print the new array to the console.

40.   Write a program that creates an array of objects representing people, with properties for name, age, and gender. Use the filter method to create a new array containing only the people who are over 30 years old. Print the new array to the console.

41.   Write a program that changes the text of a paragraph element on the page to "Hello, World!" using JavaScript.

42.   Write a program that changes the background color of a div element on the page to red when the user clicks a button.

43.   Write a program that creates a new paragraph element and adds it to the page when the user clicks a button.

44.   Write a program that changes the font size of a paragraph element on the page to 24px when the user hovers over it.

45.   Write a program that adds a new class to a div element on the page when the user clicks a button.

46.   Write a program that creates a new image element and sets its source to a specified URL when the user clicks a button.

47.   Write a program that changes the text color of a paragraph element on the page to blue when the user clicks a button.

48.   Write a program that changes the text of a button element on the page to "Clicked!" when the user clicks it.

49.   Write a program that hides a paragraph element on the page when the user clicks a button.

50.   Write a program that shows a hidden paragraph element on the page when the user clicks a button.

51.   Write a program that displays an alert message when the user clicks a button.

52.   Write a program that changes the background color of a div element when the user hovers over it.

53.   Write a program that adds a new paragraph element to the page when the user double-clicks on a button.

54.   Write a program that logs a message to the console when the user submits a form.

55.   Write a program that prevents the default action of a link when the user clicks on it.

56.   Write a program that displays a message when the user right-clicks on an image.

57.   Write a program that changes the font size of a paragraph element when the user scrolls up or down on the page.

58.   Write a program that changes the background color of a div element when the user presses a key on the keyboard.

59.   Write a program that displays a message when the user's mouse enters a specified area on the page.

60.   Write a program that displays a message when the user's mouse leaves a specified area on the page.

61.   Write a program that throws an error when a variable is undefined, and use a try-catch block to handle the error.

62.   Write a program that throws an error when a function is called with an incorrect number of arguments, and use a try-catch block to handle the error.

63.   Write a program that throws an error when a user enters an invalid value into a form field, and use a try-catch block to handle the error.

64.   Write a program that uses console.log to debug a piece of code that is not working correctly.

65.   Write a program that uses the debugger statement to debug a piece of code that is not working correctly.

66.   Write a program that throws an error when a user enters a negative number into a form field, and displays an error message to the user.

67.   Write a program that uses the console.trace method to log a trace of the function call stack.

68.   Write a program that catches a TypeError when trying to access a property of an undefined object, and displays an error message to the user.

69.   Write a program that catches a SyntaxError when a user enters an invalid value into a form field, and displays an error message to the user.

70.   Write a program that uses the try-catch-finally block to handle errors and perform cleanup tasks, such as closing a file or releasing a resource.