[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [mathBound](./rc-js-util.mathbound.md) ## mathBound() function Bound a value in to a range. **Signature:** ```typescript export declare function mathBound(value: number, min: number, max: number): number; ``` ## Parameters

Parameter	Type	Description
value	number
min	number
max	number

**Returns:** number The `value` if it lies between `min` and `max`, otherwise `min` if smaller and `max` if greater. ## Remarks NaN input will cause a debug error. See [mathBound()](./rc-js-util.mathbound.md).