# isBlank

### isBlank(source)

Return TRUE if a string is empty,equal to "" or "NULL_VALUE".

## Arguments

Argument | Data Type | Description
source | string | String to search

## Returns

True if the source has an empty string.

## Description

Returns TRUE if the source has an empty string.

## Examples

Assume that:

1. field 1 has the string "The quick brown fox"

2. field 2 has ""

3. field 3 has " " - note the space

Example | Returns | Description
isBlank(#1) | false |
isBlank(#2) | true |
isBlank(#3) | false | A space character is still enough to make the string not blank

## See Also

matches(), contains()