isNumber() function
This API is provided as a preview for developers and may change based on feedback that we receive. Do not use this API in a production environment.
该函数检查值是否为数字。
Signature:
typescript
declare function isNumber(value: any): boolean;declare function isNumber(value: any): boolean;Parameters
| Parameter | Type | Description |
|---|---|---|
| value | any | 参数“value”可以是任何数据类型。 |
Returns:
boolean
{boolean} - 一个布尔值。
Example
JavaScript
let n = 7; isNumber(n) // true
let n1 = '8'; isNumber(n1) // false let n = 7; isNumber(n) // true
let n1 = '8'; isNumber(n1) // false