**`isInteger()`** is a `Number` method that is used to determine if a given value is an integer. The `isInteger()` method is declared as follows:
```js
Number.isInteger(value)
```
* `value`: The value to be tested to check whether it is an integer or not.

# Return value
The `isInteger()` method returns a boolean depending upon the `value` as follows:
* The `isInteger()` method returns `false` if the `value` is not an integer.
* The `isInteger()` method returns `true` if the `value` is an integer. 
 

# Browser compatibility
The `isInteger()` method is supported by the following browsers:
* Edge 12
* Firefox 16
* Google Chrome 19
* Opera 22
* Safari 9

>Note: The `isInteger()` method is not supported by Internet Explorer 11 and earlier versions.




# Examples
## Example 1
Consider the code snippet below, which demonstrates the use of the `isInteger()` method:

var foo = Number.isInteger(123)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(0)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(-123)
console.log("Given value is integer: ",foo);

## Explanation
Positive, negative, and 0 integers are passed to the `isInteger()` method in *line 1*, *line 4*, and *line 7*, respectively. The `isInteger()` method returns `true`, as the given values are integers.

## Example 2
Consider the code snippet below, in which non-integers are passed to the `isInteger()` method:

var foo = Number.isInteger("123") 
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(11.7)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(Infinity)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(NaN)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(true)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger(Math.PI)
console.log("Given value is integer: ",foo);

var foo = Number.isInteger([1])
console.log("Given value is integer: ",foo);


## Explanation
Non-integers are passed to the `isInteger()` method in the code snippet above. The `isInteger()` method returns `false` for the non-integers.

What is isInteger() in Javascript?

isInteger() determines if a value is an integer, returning true or false accordingly.