Get Only DateTime Part without using Convert

All of us know many techniques to get Datetime part in sql using Convert , but here I found something interesting which will work without using Convert .
Take a look

SELECT 
    CAST( FLOOR( CAST( getDate() AS FLOAT ) ) AS DATETIME )

or

select    CAST(
    (
     STR( YEAR( GETDATE() ) ) + '/' +
     STR( MONTH( GETDATE() ) ) + '/' +
     STR( DAY( GETDATE() ) )
     )
     AS DATETIME
     )

and

select Dateadd(dd,0,datediff(dd,0,getdate()))

Reference Link: http://www.bennadel.com/blog/122-Getting-Only-the-Date-Part-of-a-Date-Time-Stamp-in-SQL-Server.htm