Convert Integer to String in SQL Server

Write the following script in SQL Server. We have three different ways in which we can achieve the desired tasks. We would be examining each one of them and check their output. In the first method we have used CAST function; in the second method we have used CONVERT function and in the third method we have used STR function.

DECLARE @Number INT

SET @Number=12345

-- Using CAST function

SELECT CAST(@Number as varchar(10)) as Num1

-- Using CONVERT function

SELECT CONVERT(varchar(10),@Number) as Num2

-- Using STR function

SELECT LTRIM(STR(@Number,10)) as Num3

Execute the preceding script and check the output.