Q
What is the result of isNaN('Hello')?

Answer & Solution

Answer: Option A
Solution:
The isNaN() function checks if a value is NaN. isNaN('Hello') returns true because 'Hello' is not a number.
Related Questions on Average

Which method returns a number in exponential notation?

A). toFixed()

B). toExponential()

C). toPrecision()

D). toString()

Which method converts a number to a string?

A). toFixed()

B). toString()

C). valueOf()

D). parseFloat()

What does the method parseInt('10.5') return?

A). 5

B). 11

C). 10

D). NaN

What does toPrecision(3) do?

A). Formats a number to 3 decimal places

B). Returns a number in exponential notation

C). Returns a string with a number written with a specified length

D). Converts a number to a string

What does isFinite(123) return?

A). 1

B). 0

C). NaN

D). undefined

What does (123.456).toFixed(1) return?

A). 4

B). 5

C). 45

D). 123

What is the result of parseInt('0xF', 16)?

A). 15

B). 0

C). NaN

D). 16

What does parseInt('101', 2) return?

A). 5

B). 101

C). NaN

D). 2

Which method can convert a number to a different base (e.g., hexadecimal)?

A). toString()

B). parseInt()

C). toFixed()

D). valueOf()

What does Number('123abc') return?

A). 123

B). NaN

C). 123abc

D). undefined