number

Question 1

isFinite()

Answer 1

Checks whether a value is a finite number

Question 2

isInteger()

Answer 2

Checks whether a value is an integer

Question 3

isNaN()

Answer 3

Checks whether a value is Number.NaN

used as a builtin function

Question 4

isSafeInteger()

Answer 4

Checks whether a value is a safe integer

Question 5

toExponential(x)

Answer 5

Converts a number into an exponential notation

Question 6

toFixed(x)

Answer 6

Formats a number with x numbers of digits after the decimal point

Question 7

toPrecision(x)

Answer 7

Formats a number to x length

Question 8

toString()

Answer 8

Converts a number to a string

Question 9

valueOf()

Answer 9

Returns the primitive value of a number