# itersum
> Compute the sum of all [iterated][mdn-iterator-protocol] values.
## Usage
```javascript
var itersum = require( '@stdlib/stats/iter/sum' );
```
#### itersum( iterator )
Computes the sum of all [iterated][mdn-iterator-protocol] values.
```javascript
var array2iterator = require( '@stdlib/array/to-iterator' );
var arr = array2iterator( [ 1.0, 2.0, -3.5, 4.0 ] );
var s = itersum( arr );
// returns 3.5
```
## Notes
- If an iterated value is non-numeric (including `NaN`), the returned [`iterator`][mdn-iterator-protocol] returns `NaN`. If non-numeric iterated values are possible, you are advised to provide an [`iterator`][mdn-iterator-protocol] which type checks and handles non-numeric values accordingly.
- For iterators which can generate many values or which may output large numbers, care should be taken to prevent overflow.
## Examples
```javascript
var runif = require( '@stdlib/random/iter/uniform' );
var itersum = require( '@stdlib/stats/iter/sum' );
// Create an iterator for generating uniformly distributed pseudorandom numbers:
var rand = runif( -10.0, 10.0, {
'seed': 1234,
'iter': 100
});
// Compute the sum:
var s = itersum( rand );
// returns
console.log( 'Sum: %d.', s );
```
[mdn-iterator-protocol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterator_protocol
