JavaScript

• What is required to run JavaScript?

  A browser
• How do you include JavaScript in an HTML document?

  Add JavaScript code between <script> tags
• What is the purpose of the <title> tag in an HTML document?

  It sets the title of the web page
• What command is used to display an alert in JavaScript?

  window.alert()
• What is the key difference in syntax between JavaScript and Python?

  JavaScript uses curly brackets, Python uses indentation
• What command is used in Python to output to the console?

  print
• How can you output to the browser's console in JavaScript?

  Using console.log()
• What keyboard shortcut opens the console in most browsers?

  Control-Shift-J
• How can you display output in a pop-up window in JavaScript?

  Using window.alert()
• What does document.write() do in JavaScript?

  It outputs directly onto the HTML page
• What is the purpose of the .innerHTML property in JavaScript?

  To change the value of HTML elements
• How do you declare a variable in JavaScript?

  Using the var command
• How does JavaScript handle data types for variables?

  It does not differentiate between integer and float
• What is a versatile way to get user input in JavaScript?

  Create a form on the page
• What is the focus of the spec regarding input methods in JavaScript?

  Focus is on using the input once received
• What is the purpose of the switch structure in JavaScript?

  To handle multiple conditions
• How does a simple if statement differ between Python and JavaScript?

  JavaScript uses parentheses and curly brackets
• What is the syntax for a for loop in JavaScript?

  for (let i = 0; i < 10; i++)
• How do you iterate through a list in JavaScript?

  Using for (let i of list)
• What is the syntax for a while loop in JavaScript?

  while (condition) {}
• What is the purpose of the do...while loop in JavaScript?

  To execute code at least once
• What is the JavaScript equivalent of Python's 'and' logical operator?

  &&
• How do you concatenate two strings in JavaScript?


  Using str.concat(str)
• What is the output of str.charAt(3) in JavaScript?

  Character in the 3rd position
• What are the exercises to practice JavaScript input handling?

  1. Create a page with two input boxes for name and number.
  2. Create a page with two input boxes for two numbers, output the larger.
  3. Create a page with three input boxes for three numbers, output the smallest.
  4. Create a page for a times table based on user input.
  5. Create a page to find the sum of integers between two numbers.
  6. Create a page to return all integers between two given numbers.
  7. Create a page to rearrange digits of a three-digit number for maximum value.
• What are common string manipulation functions in JavaScript?

  • str.charAt(index): Return character at index
  • str.substring(start, end): Return substring from start to end
  • str.length: Return length of string
  • str.indexOf('x'): Find first occurrence of 'x'
  • str.split(): Split string into array
  • str.concat(str): Concatenate two strings
  • str.trim(): Remove whitespace from ends
  • str.replace(a, b): Replace occurrences of 'a' with 'b'
• What is the output of str.length in JavaScript?

  Length of the string
• How do you find the first occurrence of a character in a string in JavaScript?

  Using str.indexOf('x')
• What is the output of str.split(',') in JavaScript?

  Array of strings split at ','
• What is the purpose of the exercises related to string manipulation?

  To practice JavaScript string handling
• What is the output of str.replace(a, b) in JavaScript?

  Replace occurrences of 'a' with 'b'
• What does str.trim() do in JavaScript?

  Removes whitespace from the beginning and end
• How can you check if two strings are palindromes in JavaScript?

  By comparing the strings in reverse
• How can you extract the domain name from an email address in JavaScript?

  By splitting the string at '@'
• What is the output of reversing a string in JavaScript?

  The string written backwards
• How can you ensure an email address does not exceed a certain length in JavaScript?

  By cutting the length of names if needed
• What is the purpose of the exercises related to user input?

  To practice handling user input in JavaScript
• What is the output of the exercise that asks for a times table?

  Prints the times table for the given number
• What is the output of the exercise that asks for the smallest of three numbers?

  Outputs the smallest of the three numbers
• What is the output of the exercise that sums integers between two numbers?

  Returns the sum of all integers between