What is a constraint?

a property a column must comply withit limits the number of records in a tableit limits the data type of a column

Yup! A constraint determines a condition a value must meet in order to be inserted into the table, but does not limit the size of the table or the columns' data type.

No. A constraint determines a condition a value must meet in order to be inserted into the table, but does not limit the size of the table or the columns' data type.