JS Numbers

Question 1

Number.isFinite(value)

Answer 1

Returns true if the value is a finite Number, otherwise it returns false

Question 2

Number.isInteger(value)

Answer 2

Returns true if the value is an integer Number, otherwise it returns false

Question 3

Number.isNaN(value)

Answer 3

Returns true if the value is Number.NaN, otherwise it returns false

Question 4

Number.isSafeInteger(value)

Answer 4

Returns true if the value is a safe integer Number, otherwise it returns false

Question 5

number. toExponential(?x)
x: An integer between 0 and 20 representing the number of digits in the notation after the decimal point. If omitted, it is set to as many digits as necessary to represent the value

Answer 5

Returns a String, representing the number as an exponential notation (i.e. 5.568e+0)

Question 6

number.toFixed(?x)

x is the number of digits after the decimal point. Default is 0 (no digits after the decimal point)

Answer 6

Returns a String, representing a number, with the exact number of decimals

Question 7

number. toPrecision(?x)

x: The number of digits. If omitted, it returns the entire number (without any formatting)

Answer 7

Returns a String, representing a number formatted to the specified precision

Question 8

number.toString(?radix)

Answer 8

Returns a String, representing a number

Question 9

number.valueOf()

Answer 9

Returns a Number, representing the primitive value of a number