Canning is the operation of preparing sterilized food so that it will keep indefinitely.
The custom of canning fruit in syrup is based on the improvement in flavor and texture which sugar gives to fruit. Sugar is not necessary for its preservation. Success depends upon thorough sterilization; that is, killing the organisms which cause food to spoil, and then sealing carefully to prevent their entrance. Fruit may be canned in water, in fruit juice and in syrup.