Method range

src/main/java/io/reactivex/rxjava3/core/Observable.java:3926–3943

Returns an Observable that emits a sequence of Integers within a specified range. Scheduler: range does not operate by defa

(int start, int count)

     * @see #intervalRange(long, long, long, long, TimeUnit)
     */
    @CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    @NonNull
    public static Observable<Integer> range(int start, int count) {
        if (count < 0) {
            throw new IllegalArgumentException("count >= 0 required but it was " + count);
        }
        if (count == 0) {
            return empty();
        }
        if (count == 1) {
            return just(start);
        }
        if ((long)start + (count - 1) > Integer.MAX_VALUE) {
            throw new IllegalArgumentException("Integer overflow");
        }
        return RxJavaPlugins.onAssembly(new ObservableRange(start, count));
    }

    /**
     * Returns an {@code Observable} that emits a sequence of {@link Long}s within a specified range.