Question : Add column to existing table, populate with default value

Curious how to accomplish/correct syntax for the following in T-SQL...

Database Name: TestDB
Existing table name: MyTable
Existing Column Names: ID, NameFirst, NameLast, MyDate

Want to add Column: "AvailabilityStat"
With Default Value= "1"
SQLType= "INT"
  (the value of this column will either be 1 or 2, so I'm assuming "INT" length will be 1.)

What would be the best/most efficient way to go about this?
~trail

Answer : Add column to existing table, populate with default value

alter tabel MyTable add AvailabilityState Int NOT NULL default (1)