Checks if an argument value contains a null value. When the argument value is null, the function returns true. Otherwise, it returns false.
| Category: | Information and Conversion |
| Returned data type: | Integer |
| Note: | The returned value is a Boolean value. |
// Expression if State <> "NC" OR isnull(State) return true else return false
integer x string y string error_message1 string error_message2 y="Hello" if(isnull(x) ) error_message1 = "Integer x is null" else error_message1= "Integer x is not null" if( isnull(y) ) error_message2 =" String y value is null" else error_message2 =" String y value is not null"