How can operations be performed on the return value of a function in Oracle PLSQL?

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The return value of a function in Oracle PL/SQL can be used as input for other functions or as parameters for procedures. It can also be stored in variables or used in conditional statements to control the flow of the program. Here are some common operations that can be performed on the return value of a function:

1. Assign it to a variable: The return value of a function can be assigned to a variable for further processing or manipulation. For example:

DECLARE
   l_result NUMBER;
BEGIN
   l_result := my_function();
   --do something with l_result
END;

1. Use it as input for another function: The return value of one function can be used as input for another function. For example:

DECLARE
   l_result1 NUMBER;
   l_result2 NUMBER;
BEGIN
   l_result1 := my_function();
   l_result2 := my_other_function(l_result1);
   --do something with l_result2
END;

1. Use it in a conditional statement: The return value of a function can be used in a conditional statement to control the flow of the program. For example:

DECLARE
   l_result NUMBER;
BEGIN
   l_result := my_function();
   IF l_result > 0 THEN
      --do something
   ELSE
      --do something else
   END IF;
END;

1. Pass it as a parameter to a procedure: The return value of a function can be used as a parameter for a procedure. For example:

DECLARE
   l_result NUMBER;
BEGIN
   l_result := my_function();
   my_procedure(l_result);
END;