Online Coding Lessons JavaScript Coding for Kids 2

Question 1

Which keyword creates a variable that can be changed later in JavaScript?

Accepted Answer

let

Answer

The let keyword makes a variable whose value can be reassigned.

Question 2

What will alert(2 + 3) show on the screen?

Accepted Answer

5

Answer

JavaScript adds the numbers 2 and 3 to get 5.

Question 3

How do you write a single-line comment in JavaScript?

Accepted Answer

// this is a comment

Answer

Two slashes start a single-line comment that JavaScript ignores.

Question 4

Which symbol joins two pieces of text (strings) together?

Accepted Answer

+

Answer

The plus sign combines strings in a process called concatenation.

Question 5

What does the prompt() function do in a web page?

Accepted Answer

Asks the user to type something

Answer

The prompt() function shows a box where the user can type an answer.

Online Coding Lessons Practice Test