doc/api/core/operators/generate.md
# This is RxJS v 4. [Find the latest version here](https://github.com/reactivex/rxjs)### `Rx.Observable.generate(initialState, condition, iterate, resultSelector, [scheduler])`[Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/observable/generate.js "View in source") Generates an observable sequence in a manner similar to a for loop, using an optional scheduler to enumerate the values. #### Arguments1. `initialState` *(`Any`)*: Initial state.2. `condition` *(`Function`)*: Condition to terminate generation (upon returning false).3. `iterate` *(`Function`)*: Iteration step function.4. `resultSelector` *(`Function`)*: Selector function for results produced in the sequence.5. `[scheduler=Rx.Scheduler.currentThread]` *(`Scheduler`)*: Scheduler on which to run the generator loop. If not provided, defaults to Scheduler.currentThread. #### Returns*(`Observable`)*: The generated sequence. #### Example```jsvar source = Rx.Observable.generate( 0, function (x) { return x < 3; }, function (x) { return x + 1; }, function (x) { return x; }); var subscription = source.subscribe( function (x) { console.log('Next: ' + x); }, function (err) { console.log('Error: ' + err); }, function () { console.log('Completed'); }); // => Next: 0// => Next: 1// => Next: 2// => Completed``` ### Location File:- [/src/core/linq/observable/generate.js](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/observable/generate.js) Dist:- [`rx.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.js)- [`rx.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.compat.js)- [`rx.all.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.all.js)- [`rx.all.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.all.compat.js)- [`rx.lite.extras.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.extras.js) Prerequisites:- None NPM Packages:- [`rx`](https://www.npmjs.org/package/rx) NuGet Packages:- [`RxJS-All`](http://www.nuget.org/packages/RxJS-All/)- [`RxJS-Main`](http://www.nuget.org/packages/RxJS-Main/)- [`RxJS-Lite`](http://www.nuget.org/packages/RxJS-Lite/) Unit Tests:- [/tests/observable/generate.js](https://github.com/Reactive-Extensions/RxJS/blob/master/tests/observable/generate.js)