The Front-End Web Developer Bootcamp - HTML, CSS, JS, and React - The isArray Method

The video tutorial explains the JavaScript isArray method, which checks if a given value is an array. It demonstrates how to use this method with variables and shows the output for both array and non-array data types. The tutorial also covers using conditional statements to execute code based on whether a value is an array.

What is the primary function of the isArray method in JavaScript?

• To convert a string to an array

• To check if a value is an array

• To find the length of an array

• To sort an array

In the example provided, what is the output when the variable contains an array?

• False

• Null

• Undefined

• True

What happens when the variable is changed to a number type in the example?

• The output remains true

• The output changes to false

• The output becomes undefined

• The output is an error

How can you execute different code based on whether a value is an array?

• Using a try-catch block

• Using a for loop

• Using a switch statement

• Using an if-else statement

What does the else condition output when the value is not an array?

• This is not an array

• Array is full

• This is an array

• Array is empty