JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - Exercise - Declare a Variable in JavaScript and L

The video tutorial covers the concept of variables in JavaScript, focusing on data types. It begins with an explanation of variables and data types, particularly strings. The instructor then provides an exercise for students to declare a variable as a number, set it to five, and use console.log to verify the output. The video concludes with instructions for completing the exercise.

What is a variable in JavaScript primarily used for?

• Connecting to databases

• Styling HTML elements

• Executing functions

• Storing data values

Which data type was used in the example provided in the video?

• Object

• Number

• Boolean

• String

What is the task in the exercise given in the video?

• Declare a variable as a number and set it to five

• Style a webpage

• Declare a variable as a string

• Create a function

What should be the output when you console log the variable in the exercise?

• undefined

• 5

• 10

• 0

Why is it important to check the output of the console log in the exercise?

• To verify the variable is a string

• To confirm the variable is undefined

• To check if the variable is an object

• To ensure the variable is declared correctly