ISFALSE

The ISFALSE function returns TRUE when the truth value of boolean-expression is FALSE, and FALSE when the truth value is TRUE or NULL.

boolean-expression: An expression that returns a built-in Boolean, character string, graphic string, integer, or decimal floating-point data type. A character string, graphic string, integer, or decimal floating-point value is cast to Boolean. For more information about converting character string, graphic string, integer, and decimal floating-point to Boolean, see BOOLEAN.

The data type of the result is Boolean.

Examples

Example 1: The following statement returns a value of data type BOOLEAN with the value FALSE.
```
 VALUES ISFALSE(1)
```
Example 2: The following statement returns a value of data type BOOLEAN with the value TRUE.
```
 VALUES ISFALSE('NO')
```
Example 3: The following statement returns a value of data type BOOLEAN with the value FALSE.
```
 VALUES ISFALSE('Yes')
```
Example 4: The following statement returns a value of data type BOOLEAN with the value FALSE.
```
 VALUES ISFALSE(NULL)
```