Javascript Basic

What is a JavaScript variable?

• A container that holds a value

• A function that performs a task

• A way to add styles to a website

• A type of data

How do you write a JavaScript string?

• "Hello World!"

• Hello World!

• 'Hello World!'

• `Hello World!`

What is the difference between = and == in JavaScript?

• = assigns a value to a variable and == compares values

• = compares values and == assigns a value to a variable

• = and == are the same thing

• = assigns a value to a variable and == assigns a value to a variable

How do you create a JavaScript function?

• create function myFunction() {}

• new function myFunction() {}

• myFunction() {}

• function myFunction() {}

How do you write a JavaScript alert?

• alert = "Hello World!";

• alert {Hello World!};

• alert("Hello World!");

• alert "Hello World!";

How do you write a JavaScript comment?

• # This is a comment

• // This is a comment

• /* This is a comment */

• -- This is a comment

How do you change the background color of an HTML element using JavaScript?

• element.color = "red";

• element.background = "red";

• element.style.backgroundColor = "red";

• element.setBackground("red");

What is JavaScript used for?

• Creating interactive websites

• Making video games

• Designing graphics

• All of the answers

How do you add an event listener to a button in JavaScript?

• button.addEventListener("click", myFunction);

• button.listenEvent("click", myFunction);

• button.onEvent("click", myFunction);

• button.eventListener("click", myFunction);

What is the result of the following code? var x = 5; x++;

• 4

• 5

• 6

• 7