What is the difference between parseInt() and Number()?

Question

How do parseInt() and Number() behave differently when converting strings to numbers?

Answer 1

parseInt() -> Parses a number to specified redix.

Number()-> Converts the specified value to its numeric equivalent or NaN if it fails to do so.

Hence for converting some non-numeric value to number we should always use Number() function.

eg.

Number("")//0
parseInt("")//NaN

Number("123")//123
parseInt("123")//123

Number("123ac") //NaN,as it is a non numeric string
parsInt("123ac") //123,it parse decimal number outof string

Number(true)//1
parseInt(true) //NaN

There are various corner case to parseInt() functions as it does redix conversion, hence we should avoid using parseInt() function for coersion purposes.

Now, to check weather the provided value is Numeric or not,we should use nativeisNaN() function