# iterUnitspace > Create an iterator which returns numbers incremented by `1`.
## Usage ```javascript var iterUnitspace = require( '@stdlib/iter/unitspace' ); ``` #### iterUnitspace( start\[, stop] ) Returns an iterator which returns numbers incremented by `1`. ```javascript var it = iterUnitspace( -5 ); // returns var v = it.next().value; // returns -5 v = it.next().value; // returns -4 v = it.next().value; // returns -3 // ... ``` The returned iterator protocol-compliant object has the following properties: - **next**: function which returns an iterator protocol-compliant object containing the next iterated value (if one exists) assigned to a `value` property and a `done` property having a `boolean` value indicating whether the iterator is finished. - **return**: function which closes an iterator and returns a single (optional) argument in an iterator protocol-compliant object. By default, the stopping value is `+infinity`, and, hence, the returned iterator is an infinite iterator (i.e., the iterator never ends). To specify an alternative stopping value, provide a second argument. ```javascript var it = iterUnitspace( 0, 2 ); // returns var v = it.next().value; // returns 0 v = it.next().value; // returns 1 v = it.next().value; // returns 2 var bool = it.next().done; // returns true ```
## Notes - The returned iterator is guaranteed to return the `start` value and stops upon exceeding the `stop` value. - If an environment supports `Symbol.iterator`, the returned iterator is iterable.
## Examples ```javascript var iterUnitspace = require( '@stdlib/iter/unitspace' ); // Create an iterator: var it = iterUnitspace( -50, 50 ); // Perform manual iteration... var v; while ( true ) { v = it.next(); if ( v.done ) { break; } console.log( v.value ); } ```
* * * ## See Also - [`@stdlib/array/from-iterator`][@stdlib/array/from-iterator]: create (or fill) an array from an iterator. - [`@stdlib/iter/incrspace`][@stdlib/iter/incrspace]: create an iterator which returns evenly spaced numbers according to a specified increment. - [`@stdlib/iter/linspace`][@stdlib/iter/linspace]: create an iterator which returns evenly spaced numbers over a specified interval. - [`@stdlib/iter/step`][@stdlib/iter/step]: create an iterator which returns a sequence of numbers according to a specified increment.
[@stdlib/array/from-iterator]: https://www.npmjs.com/package/@stdlib/array-from-iterator [@stdlib/iter/incrspace]: https://github.com/stdlib-js/iter/tree/main/incrspace [@stdlib/iter/linspace]: https://github.com/stdlib-js/iter/tree/main/linspace [@stdlib/iter/step]: https://github.com/stdlib-js/iter/tree/main/step