JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Math Object / 042

This video tutorial introduces JavaScript's Math object, explaining how to access its properties and methods. It covers key methods like round, floor, ceil, power, and sign, with examples demonstrating their usage. The tutorial also explains generating random numbers using Math.random, providing practical examples for better understanding.

What is the Math object in JavaScript primarily used for?

• Handling string operations

• Performing mathematical operations

• Styling HTML elements

• Managing arrays

Which method would you use to round a number to the nearest integer?

• Math.round()

• Math.trunc()

• Math.ceil()

• Math.floor()

What does Math.floor() do to a number?

• Rounds it to the nearest integer

• Rounds it up to the nearest integer

• Rounds it down to the nearest integer

• Truncates the decimal part

If you have a number 15.7, what will Math.ceil(15.7) return?

• 15.7

• 16

• 15

• 17

What is the result of Math.pow(2, 3)?

• 12

• 6

• 9

• 8

What does Math.sign() return for a negative number?

• 0

• 1

• The number itself

• -1

What range of numbers does Math.random() generate?

• 1 to 10

• 0 to 1

• 0 to 100

• 0 to 10

How can you generate a random integer between 0 and 9 using Math.random()?

• Math.random() * 10

• Math.floor(Math.random() * 10)

• Math.round(Math.random() * 10)

• Math.ceil(Math.random() * 10)

What is the purpose of multiplying Math.random() by a number?

• To generate a larger range of random numbers

• To generate negative random numbers

• To increase the precision

• To decrease the precision

Which method would you use to ensure a random number is an integer?

• Math.ceil()

• Math.floor()

• Math.round()

• All of the above