学习

语法:

       CASE  <变量f>.

         WHEN <Value1>.

            <Statement1>

         WHEN <Value2>.

            <Statement2>

         ….

         WHEN OTHERS.

            <others Statement>

       ENDCASE.

       Example:

                 S = ‘A’.

                 CASE  S.

                    WHEN  ‘X’.

                       WRITE / ‘String is X’.

                    WHEN OTHERS.

                       WRITE / ‘String is not X’.

                 ENDCASE.