Is a full binary tree the same as a complete binary tree, or are there differences between the two structures?

A full binary tree is a type of binary tree where each node has either 0 or 2 children. A complete binary tree is a binary tree where all levels are fully filled except possibly for the last level, which is filled from left to right. So, a full binary tree can be a complete binary tree, but not all complete binary trees are full binary trees.