Passing multiple value to IN Operator

The below code will demonstrate how to pass multiple value in a variable which is used with IN operator

CREATE TABLE #T(Region VARCHAR(100))
INSERT INTO #T SELECT 'EAST' UNION ALL SELECT 'WEST' UNION ALL SELECT 'NORTH' UNION ALL SELECT 'SOUTH'

DECLARE @sql NVARCHAR(1000)
DECLARE @RegionName VARCHAR(100) = 'EAST,WEST'
DECLARE @Region VARCHAR(100) = '''' + Replace(@RegionName,',',''',''') +''''
		
SET @sql = 'SELECT 
					t.*	
				FROM #T t
				WHERE t.Region IN(' + @Region + ')'
	
EXECUTE sp_executesql @sql  
DROP TABLE #T

Region
--------
EAST
WEST