JavaScript Simplified - Chapter 92 Exercises

The data type for true and false values is ________

boolean

[b|B]oolean

The data type for "Hello world!" is _______

string

[s|S]tring

The data type for -.0934 is ________

number

[n|N]umber

The data type for the following is ________

const patient409 = {
name: "Felix Underwood"
}

object

[o|O]bject

When the following code executes, what does the console display?

let x;
console.log(x);

undefined

[u|U]ndefined

What is the data type of the following?

["tempest", "gale", "storm"]

object

[o|O]bject

Assign a value of nothing to x, which hasn't been declared beforehand.

let x = null;

letx=null;

What is the data type of the following?

const rightNow = new Date();

object

[o|O]bject

Declare a variable without assigning it a value.

Use the keyword typeof to display the variable's data type in an alert.

Wait a moment.

If you've coded correctly, an alert will display the data type.

Dismiss the alert by clicking OK.

For help with this code, see Chapter 92 in the book.

JavaScript Simplified / Chapter 92 Exercises