The Front-End Web Developer Bootcamp - HTML, CSS, JS, and React - Number Methods

The video tutorial covers various number methods in JavaScript, including converting strings to numbers using the Number method, and using parseInt and parseFloat for integer and float conversions. It also explains the isFinite and isInteger methods for checking number types, and demonstrates how to format numbers using toFixed and toPrecision methods.

What is the primary purpose of the Number method in JavaScript?

• To convert a string to a number

• To format a number with commas

• To convert a number to a string

• To check if a value is a number

What does the parseInt method do with decimal values?

• Truncates the decimal part

• Leaves them unchanged

• Rounds them to the nearest integer

• Converts them to strings

How does parseInt handle multiple values in a string?

• It converts the last value to an integer

• It only converts the first value to an integer

• It converts all values to integers

• It throws an error

What is the main difference between parseInt and parseFloat?

• parseFloat is used for strings only

• parseFloat converts to strings, parseInt handles numbers

• parseInt is faster than parseFloat

• parseInt converts to integers, parseFloat handles decimals

What does the isFinite method return when given a non-numeric string?

• An error

• False

• True

• The string itself

Which method would you use to determine if a number is an integer?

• parseInt

• toFixed

• isFinite

• isInteger

How does the toPrecision method differ from toFixed?

• toPrecision converts numbers to strings

• toPrecision adds commas to numbers

• toPrecision rounds off the last digit

• toPrecision does not handle decimals