# IntRange

`type` in `services` · v0.7.1

<https://docs.seedcord.org/packages/services/0.7.1/types/int-range>

Generate a union of numbers between a specified start (inclusive) and end (exclusive), with an optional step.

You skip over numbers using the `Step` parameter (defaults to `1`). For example, `IntRange<0, 10, 2>` will create a union of `0 | 2 | 4 | 6 | 8`.

Note: `Start` or `End` must be non-negative and smaller than `1000`.

Use-cases: 1. This can be used to define a set of valid input/output values. for example:

## Examples

```ts
import type {IntRange} from 'type-fest';

type Age = IntRange<0, 20>;
//=> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19

type FontSize = IntRange<10, 20>;
//=> 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19

type EvenNumber = IntRange<0, 11, 2>;
//=> 0 | 2 | 4 | 6 | 8 | 10

2. This can be used to define random numbers in a range. For example, type RandomNumber = IntRange<0, 100>;
```

```ts
import type {IntRange} from 'type-fest';

type ZeroToNine = IntRange<0, 10>;
//=> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

type Hundreds = IntRange<100, 901, 100>;
//=> 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900
```

## Declaration

```ts
type IntRange<
    Start extends number,
    End extends number,
    Step extends number = 1
> = PrivateIntRange<Start, End, Step>;
```

## See also

- IntClosedRange