grammar
var num = new Number(value);
Number object properties
| Attributes |
description |
| constructor |
Returns a reference to the Number function that created this object |
| MAX_VALUE |
The largest number that can be represented |
| MIN_VALUE |
Representable minimum number |
| NEGATIVE_INFINITY |
Negative infinity, return this value when overflow |
| NaN |
Non-numeric value (NaN will be returned if a parameter value cannot be converted to a number) |
| POSITIVE_INFINITY |
Positive infinity, return this value when overflow |
| prototype |
Allows you to have the ability to add properties and methods to objects |
Number object methods
| method |
描述 |
| toExponential(x) |
Convert the value of an object to exponential notation |
| toFixed(x) |
Convert the number to a string with a specified number of digits after the decimal point |
| toPrecision(x) |
Format the number to the specified length |
| toString() |
Convert numbers to strings, using specified radix |
| valueOf() |
Returns the basic numeric value of a Number object |
