Tree Traversal

Traversal Algorithms preorder inorder postorder

PreOrder Traversal

Inorder Traversal

Postorder Traversal

In which order does a inorder traversal visit the vertices in this ordered rooted tree? procedure inorder(T: ordered rooted tree) r := root of T if r is a leaf then list r else begin l:= first child of r from left to right T(l) := subtree with l as its root inorder(T(l)) list r for each child c of r except for l left to right T(c) := subtree with c as its root preorder(T(c)) end output: j e n k o p b f a c l g m d h i

In which order does a postorder traversal visit the vertices in this ordered rooted tree?

Infix, Prefix, and Postfix Notation represent complicated expressions using an ordered rooted tree (typically binary) Algebraic expressions preorder – Polish notation inorder – infix notation postorder – reverse Polish notation