How do I control how many digits are in a int field?

[Thomas Mahoney]

I'm trying to add a release year field to my Movie Collection database. The field must be 4 digits long. I've already checked the tutorials at tutorialspoint.com. They are no help in this matter.

My code is:

Create table Movies (
ID int primary key auto_increment,
Title varchar (30) not null,
...
YearReleased int (4)
);

Will this work?