ABAP Keyword Documentation → ABAP - Reference → Program Flow → Expressions and Functions for Logical Expressions → Logical Functions
The return code of a predicate function is a truth value. This makes a predicate function a special formulation of a logical expression. Like any logical expression, predicate functions can be used as conditions in control statements, as arguments of Boolean functions, or in relationships with Boolean operators.
Other versions: 7.31 | 7.40 | 7.54