PPT ½½¶óÀ̵å
 
 
-   The CASE  statement allows operations  to  be   performed  based  on  the   value  of  a single  expression,     as indicated  by  the ¡°selector  expression¡±.
process   (¡¦) begincase  ( selector expression )  iswhen ..	. =>  	sequential statements ;when ... =>  	sequential statements ; when ... =>  	sequential statements ; end case ; 
process (...)begincase  ( selector expression )  iswhen ... =>  	sequential statements ; . . . when others =>	sequential statements ; end case ;