time-to-botec/squiggle/node_modules/@stdlib/math/iter/sequences/nonnegative-even-integers/README.md

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# iterNonNegativeEvenIntegersSeq

> Create an iterator which generates a sequence of [nonnegative even integers][oeis-a005843].

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## Usage

<!-- eslint-disable id-length -->

```javascript
var iterNonNegativeEvenIntegersSeq = require( '@stdlib/math/iter/sequences/nonnegative-even-integers' );
```

#### iterNonNegativeEvenIntegersSeq( \[options] )

Returns an iterator which generates a sequence of nonnegative even integers.

<!-- eslint-disable id-length -->

```javascript
var it = iterNonNegativeEvenIntegersSeq();
// returns <Object>

var v = it.next().value;
// returns 0

v = it.next().value;
// returns 2

v = it.next().value;
// returns 4

// ...
```

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.

The function supports the following `options`:

-   **iter**: number of iterations. Default: `4503599627370497`.

By default, the function returns a finite iterator to avoid exceeding the maximum safe double-precision floating-point integer. To adjust the number of iterations, set the `iter` option.

<!-- eslint-disable id-length -->

```javascript
var opts = {
    'iter': 2
};
var it = iterNonNegativeEvenIntegersSeq( opts );
// returns <Object>

var v = it.next().value;
// returns 0

v = it.next().value;
// returns 2

var bool = it.next().done;
// returns true
```

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## Notes

-   If an environment supports `Symbol.iterator`, the returned iterator is iterable.

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## Examples

<!-- eslint no-undef: "error" -->

<!-- eslint-disable id-length -->

```javascript
var iterNonNegativeEvenIntegersSeq = require( '@stdlib/math/iter/sequences/nonnegative-even-integers' );

// Create an iterator:
var opts = {
    'iter': 100
};
var it = iterNonNegativeEvenIntegersSeq( opts );

// Perform manual iteration...
var v;
while ( true ) {
    v = it.next();
    if ( v.done ) {
        break;
    }
    console.log( v.value );
}
```

</section>

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[oeis-a005843]: http://oeis.org/A005843

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