How to truncate all table in a SQL SERVER database

SET NOCOUNT ON;

DECLARE @TBL TABLE (

       rowNum INT identity(1, 1)

       ,table_name NVARCHAR(100)

       )

DECLARE @counter INT

       ,@count INT

INSERT INTO @TBL

SELECT TABLE_NAME

FROM INFORMATION_SCHEMA.TABLES

SELECT @count = @@rowcount

       ,@counter = 1

SELECT *

FROM @TBL

WHILE (@counter <= @count)

BEGIN

       DECLARE @tblName NVARCHAR(100)

              ,@sql1 NVARCHAR(256)

       SELECT @tblName = table_name

       FROM @TBL

       WHERE rowNum = @counter

       SET @sql1 = 'TRUNCATE TABLE ' + @tblName

       PRINT (@sql1)

       PRINT 'GO'

       SET @counter = @counter + 1

END