# LessThan

`type` in `services` · v0.7.1

<https://docs.seedcord.org/packages/services/0.7.1/types/less-than>

Returns a boolean for whether a given number is less than another number.

## Examples

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

type A = LessThan<1, -5>;
//=> false

type B = LessThan<1, 1>;
//=> false

type C = LessThan<1, 5>;
//=> true

Note: If either argument is the non-literal number type, the result is boolean.
```

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

type A = LessThan<number, 1>;
//=> boolean

type B = LessThan<1, number>;
//=> boolean

type C = LessThan<number, number>;
//=> boolean
```

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

// Use `LessThan` to constrain a function parameter to negative numbers.
declare function setNegative<N extends number>(value: LessThan<N, 0> extends true ? N : never): void;

setNegative(-1); // ✅ Allowed
setNegative(-2); // ✅ Allowed

// @ts-expect-error
setNegative(0);

// @ts-expect-error
setNegative(1);
```

## Declaration

```ts
type LessThan<A extends number, B extends number> =
    GreaterThanOrEqual<A, B> extends infer Result
        ? Result extends true
            ? false
            : true
        : never;
```