JavaScript Number object
Number object
The Number object is the wrapper object of the original value.
Number was created in the form of new Number().
Grammar
var num = new Number(value);
Note: If a parameter value cannot be converted to a number, NaN (non-numeric value) is returned.
Number object properties
| Property | Describe |
|---|---|
| constructor | Returns a reference to the Number function that created this object. |
| MAX_VALUE | The maximum number that can be represented. |
| MIN_VALUE | The smallest number that can be represented. |
| NEGATIVE_INFINITY | Negative infinity, returned on overflow. |
| NaN | Non-numeric values. |
| POSITIVE_INFINITY | positive infinity, returning the value when it overflows. |
| prototype | Allows you to have the ability to add properties and methods to objects. |
Number object method
| method | describe |
|---|---|
| toExponential(x) | Convert the value of the object to an exponential count method. |
| toFixed(x) | Convert the number to a string, and the result is a number of positioning numbers. |
| toPrecision(x) | Format the numbers to the specified length. |
| toString() | Convert numbers to strings and use the specified base. |
| valueOf() | Returns the basic numeric value of a Number object. |