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JavaScript Number
JavaScript Number Object
The Number Object in JavaScript authorizes us to represents a numeric value. The numeric value can be an integer or floating-point. The Number Object in JavaScript follows the IEEE standard in order to represent the floating-point numbers.
We can create the number object in JavaScript by the help of Number () Constructor.
Lets understand it with an example:
var n=new Number(value);
It returns NaN(Not a Number) that can be checked by isNaN () method only if the value can’t be converted to a number.
We can also assign a number to a variable directly, let’s take this example to understand it better:
var a=101;//integer value var b=50.7;//floating point value var c=12e4;//exponent value, output: 120000 var z=new Number(20);//integer value by number object
Number Constants in JavaScript
Following is the list of Number Constants in JavaScript along with a brief description:
| Constant | Description |
|---|---|
| MIN_VALUE | This constant returns the largest minimum value. |
| MAX_VALUE | This constant returns the largest maximum value. |
| POSITIVE_INFINITY | This constant returns overflow value, positive infinity. |
| NEGATIVE_INFINITY | This Constant returns overflow value, negative infinity. |
| NaN | This constant represents "Not a Number" value. |
Number Methods in JavaScript
Following is the list of Number Methods in JavaScript along with a brief description
| Methods | Description |
|---|---|
| isFinite() | This method governs whether the provided value is a finite number. |
| isInteger() | This method governs whether the provided value is an integer. |
| parseFloat() | This method converts the provided string into a floating point number. |
| parseInt() | This method transforms the provided string into an integer number. |
| toExponential() | This method returns the string that depicts the exponential notation of the given number. |
| toFixed()() | This method returns the string that depicts a number with exact digits after a decimal point. |
| toPrecision() | This method returns the string depicting a number of specified precision. |
| toString() | This method returns the provided number in the form of a string. |