The Relational routine contains several functions which allow you to check affirmations based on boolean values.
You can access these functions by double-clicking the Relational node under the system routines folder in the Repository tree view.
Function |
Description |
Syntax |
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Checks if the variable provided is a null value. It returns |
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Returns the complement of the logical value of an expression. |
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Checks if the variable provided is a null value. It returns |
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ISNULL
function, along with a tJava component,
for
example:String str = null;
System.out.println(Relational.ISNULL(str));
In this example, the test result is displayed in the Run view: