JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Type Conversion / 017

The video tutorial covers type conversion in JavaScript, explaining how to convert between strings, numbers, and booleans. It highlights the importance of understanding data types when taking user input and demonstrates conversion methods using examples. The tutorial also discusses NaN and conversion errors, emphasizing the need to ensure values are convertible. Additionally, it explores boolean conversion, identifying falsy values like null, undefined, and zero, and explains how these values affect logical operations.

Why is type conversion important when dealing with user inputs?

• To make the code more readable

• To ensure data is stored in the correct format

• To make the code run faster

• To reduce the size of the code

What JavaScript method is used to check the type of a variable?

• varType

• getType

• checkType

• typeof

Which method is used to convert a string to a number in JavaScript?

• parseInt

• Number

• toString

• convertToNumber

What does NaN stand for in JavaScript?

• New Array Number

• Not a Number

• Null and None

• Number and Null

Which of the following is a falsy value in JavaScript?

• 0

• 1

• Infinity

• 50

What will be the boolean value of an empty string in JavaScript?

• true

• false

• undefined

• null

Which of the following values is considered truthy in JavaScript?

• Non-empty string

• undefined

• null

• NaN