Functions can be utilized as substitutes for values that yield identical return types.
In the preceding example, we've created a variable TEST_VAR and used the LENGTH-function to store its length (+5) into another variable TEST_LEN.
Another way of using them is by calling them directly.
In this example, we've used the SAY-function to print text to the SYSPRINT log file. When we call a function using the CALL-statement, we effectively create a new rule. More information on rules will be provided in the next chapter.
PRX ships with an extensive of predefined functions, offering a wide array of functionality for various tasks. Each function within PRX is designed to accept zero or more parameters, each parameter being of a specific . These functions also support overloading, enabling them to handle different parameter combinations and return values of specific types. A function can either be used in place of values that correspond to their return value type or directly within rules.