Java || level-order-traversal || Easy to understand || Beginner friendly
// A simple Level Order Traversal will work here because ultimately we have to print the value of the leftmost node from the bottom of the tree.\nclass Solution
// A simple Level Order Traversal will work here because ultimately we have to print the value of the leftmost node from the bottom of the tree.\nclass Solution {\n\n    public int findBottomLeftValue(TreeNode root) {\n\t\n        int ans = 0;\n\t\t\n        Queue<TreeNode> q = new LinkedList();\n        q.add(root);\n        while(!q.isEmpty()){\n            int count = q.size();\n            for(int i = 0; i<count; i++){\n                TreeNode curr = q.poll();\n                if(i==0)\n                    ans = curr.val;\n                if(curr.left!=null)\n                    q.add(curr.left);\n                if(curr.right!=null)\n                    q.add(curr.right);\n            }\n        }\n        return ans;\n    }\n}
['Java']