> For the complete documentation index, see [llms.txt](https://200ok.gitbook.io/200ok-documents/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://200ok.gitbook.io/200ok-documents/user-manual/built-in-functions/logical/isblank.md).

# isBlank

 isBlank function is the Standard function available in 200OK.

**Description** : The Blank function checks whether an expression is blank and returns TRUE or FALSE accordingly.

**Syntax** : fx\_isBlank(expression)

**Example** : fx\_isBlank(10) returns false, while fx\_isBlank() returns true as the response.

Here we go with simple scenario using the above function.

**Request Side** : 

<figure><img src="https://lh7-us.googleusercontent.com/5pvi6fFgImMzDxcp_P6dH9bJwruWmtEUgvuiqhy15QReayJzY9z5AIzQNIA9wq7PhN6IzBKq3uSPbHVPwW8VWR3BP8NSO7bWOI_MEwG3_m13Evwe1SHvXhoUcde_0n1FH5b1OGK402yY4o-6D09iu8M" alt=""><figcaption></figcaption></figure>

**Response Side** :&#x20;

<figure><img src="https://lh7-us.googleusercontent.com/Mtn02qyWfgy4xobl02UAyvhC3fy3Nc_7J3WA2WKn682jf3ysPsRYwTwl2FNUqyg9Um_DHoj5W__yX0b1hJLSz7KFl9UeDT739waLOscYWEjLAdihWY-9XBoEeVwwR1gtUTQydq71SbTKHIxnNxvXBkI" alt=""><figcaption></figcaption></figure>

<figure><img src="https://lh7-us.googleusercontent.com/EkGZLH1CYZpV49Iemmvl8gMWXU-gU46ifZ2zO3yaHKLkzQYlZQ32hIqciyg1jqTBedso9gBBPPCXZW9t0CnoHV-rUlBD_qsxhOIf-gXJY-3LC9yPpdW6gCTcxiIKLq8WmA8ZcnVTOdMpqRvmuC4bM4o" alt=""><figcaption></figcaption></figure>