> For the complete documentation index, see [llms.txt](https://docs.emobiq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emobiq.com/emobiq-client/006-actions-and-visual-logic/action-reference/react-native/validation/isnumber.md).

# isNumber

## Description

Checks whether the value input is a number.

## Input / Parameter

| Name  | Description              | Input Type | Default | Options | Required |
| ----- | ------------------------ | ---------- | ------- | ------- | -------- |
| value | The value to be checked. | Any        | -       | -       | Yes      |

## Output

N/A

## Example

In this example, we will check whether a Number is valid and print the result in the console.

### Step

1. Drag a `button` component into the canvas and open the `Action` tab. Select the `press` event of the button and drag the `Log.write` function to the event flow.
2. Call the function `Validation.isNumber` inside the `Log.write` function.
3. Enter the value for the number to be validated. In this example, we will enter the value "12".

   ![](/files/3midKtXxVuDnaSU2rIqt)

### Result

1. The console will print `true` since it is a valid Number.