Newbie needs help with syntax

[David Lyon]

I get the following error from mysql cli when I try and run this procedure;

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '@newstr varchar(200);

This is the procedure;

drop procedure if exists `network`.`procNetDebugVarChar`;

delimiter $$
create procedure `network`.`procNetDebugVarChar`()
begin
declare @newstr varchar(200);
set @newstr = 'hello world';
end $$
delimiter ;

Can anyone tell me what is wrong with the syntax?