## is-index-x
Determine whether the passed value is a zero based index.
**Version**: 1.1.0
**Author**: Xotic750
**License**: [MIT](<https://opensource.org/licenses/MIT>)
**Copyright**: Xotic750
### `module.exports(value, [length])` ⇒ boolean ⏏
This method determines whether the passed value is a zero based index.
JavaScript arrays are zero-indexed: the first element of an array is at
index 0, and the last element is at the index equal to the value of the
array's length property minus 1.
**Kind**: Exported function
**Returns**: boolean - A Boolean indicating whether or not the given value is a
zero based index within bounds.
| Param | Type | Default | Description |
| --- | --- | --- | --- |
| value | number \| string | | The value to be tested for being a zero based index. |
| [length] | number | MAX_SAFE_INTEGER | The length that sets the upper bound. |
**Example**
```js
var isIndex = require('is-index-x');
isIndex(0); // true
isIndex(1); // true
isIndex('10'); // true
isIndex(-100000); // false
isIndex(Math.pow(2, 53)); // false
isIndex(0.1); // false
isIndex(Math.PI); // false
isIndex(NaN); // false
isIndex(Infinity); // false
isIndex(-Infinity); // false
isIndex(true); // false
isIndex(false); // false
isIndex([1]); // false
isIndex(10, 10); // false
```