Oracle cursors: Query and print the employee's name and salary ____oracle

--Query and print the employee's name and salary
--set serveroutput on
/* 1, the cursor's properties
      %found: False if the record is taken,
      %notfound:
* *
DECLARE
--defines a cursor
cursor cemp is select ename,sal from emp;
--Define the corresponding variable Pename emp.ename%type for the cursor
;
Psal Emp.sal%type;

Begin
     --Opens the cursor open
     cemp;
     
     Loop
          --Takes a record  into the following order and defines the ename,sal sequence behind the cursor to
          fetch cemp into pename,psal;
          --thinking: 1, when the cycle exit. 2, fetch may not be able to take the record
          --exit when did not take the record
          exit when Cemp%notfound;
          
          --Print fetched records
          dbms_output.put_line (pename| | ' 's salary is ' | | PSAL);
     
     End Loop;
     
     --Closes the cursor close
     cemp;
End;
/