-- https://docs.oracle.com/en/database/oracle/oracle-database/23/lnpls/plsql-language-fundamentals.html
DECLARE
  hours_worked    INTEGER := 40;
  employee_count  INTEGER := 0;

  pi     CONSTANT REAL := 3.14159;
  radius          REAL := 1;
  area            REAL := (pi * radius**2);
BEGIN
  NULL;
END;
/