numObj

Required. A Number object.

precision

Optional. Number of significant digits. Must be in the range 1 ΓÇô 21, inclusive.

For numbers in exponential notation, precision - 1 digits are returned after the decimal point. For numbers in fixed notation, precision significant digits are returned.

If precision is not supplied or is undefined, the toString method is called instead.

Version 5.5

Applies To: Number Object (JScript 5.6)

Reference