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5.2: Sample implementations for Tree Traversal

  • Page ID
    47901
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    preorder(node)
     visit(node)
     if node.left ≠ null then preorder(node.left)
     if node.right ≠ null then preorder(node.right)
    
    inorder(node)
     if node.left ≠ null then inorder(node.left)
     visit(node)
     if node.right ≠ null then inorder(node.right)
    
    postorder(node)
     if node.left ≠ null then postorder(node.left)
     if node.right ≠ null then postorder(node.right)
     visit(node)
    
    levelorder(root)
     queue<node> q
     q.push(root)
     while not q.empty do
      node = q.pop
      visit(node)
      if node.left ≠ null then q.push(node.left)
      if node.right ≠ null then q.push(node.right)
    

    For an algorithm that is less taxing on the stack, see Threaded Trees.


    5.2: Sample implementations for Tree Traversal is shared under a CC BY-SA license and was authored, remixed, and/or curated by LibreTexts.

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