Modern Web Design with HTML5, CSS3, and JavaScript - Creating User Input with a Prompt Code in JavaScript - Coding Chall

The video tutorial covers the use of the JavaScript prompt function to gather user input and assign it to a variable. It explains how to concatenate strings and output the result using the console. A challenge is presented to create a prompt, get the user's name, and display a welcome message both in the console and on the webpage. The solution involves using document methods to display the message and emphasizes the importance of variable declaration order.

What is the primary purpose of the prompt function in JavaScript?

• To display a message to the user

• To receive input from the user

• To log messages to the console

• To create a new variable

How can you assign the input from a prompt to a variable in JavaScript?

• By using a loop

• Through a console log

• Using the alert function

• By directly assigning the prompt to a variable

What is the result of concatenating two string values in JavaScript?

• An undefined value

• A new array

• A combined string

• A boolean value

Which method can be used to display a message on a webpage?

• prompt()

• alert()

• document.write()

• console.log()

What is important to remember about the order of operations when using variables in JavaScript?

• Variables should be declared at the end of the script

• Variables must be declared before they are used

• The order does not matter

• Variables can be used before they are declared

What happens if you try to use a variable before it is declared?

• An error will be thrown

• The variable will be set to null

• The script will run without errors

• The variable will be automatically declared

Which method is used to select an element by its ID in JavaScript?

• document.getElementsByTagName()

• document.getElementsByClassName()

• document.querySelector()

• document.getElementById()