Store Procedure Select into a variable

Question

How can I count the result of a table and pass into a Stored Procedure Variable?

DECLARE @totalrecs varchar
select count(id) from table1

I want the count record in the totalrecs variable.

Answer 1

select @totalrecs= count(id) from table1

Answer 2

like this

--will not count NULLS
select @totalrecs= count(id) from table1

--will count NULLS
select @totalrecs= count(*) from table1

Answer 3

DECLARE @totalCount Int
Select @totalCount = count(*) 
From table1

Exec sp_DoSomething @Var = @totalCount