`Rx.Observable.range(start, count, [scheduler])`

Ⓢ

Generates an observable sequence of integral numbers within a specified range, using the specified scheduler to send out observer messages.

Arguments

start (Number): The value of the first integer in the sequence.
count (Number): The number of sequential integers to generate.
[scheduler=Rx.Scheduler.currentThread] (Scheduler): Scheduler to run the generator loop on. If not specified, defaults to Scheduler.currentThread.

Returns

(Observable): An observable sequence that contains a range of sequential integral numbers.

Example

var source = Rx.Observable.range(0, 3);

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