# Searching in Binary Search tree in C

## Searching in Binary Search Tree in C

Here, in this page we will discuss searching in binary search tree in C. A binary search tree is a tree in which the data in left sub-tree is less than the root and the data in right sub-tree is greater than the root.Given a Binary Search tree and a key, check whether the key is present in the tree or not.

## Algorithm :

• If tree is empty return.
• Check whether key is greater or smaller than root.
• If greater, move to the right subtree. Otherwise move to the left subtree.
• If Key is found return true.

## Code in C for Searching in Binary Search Tree

Run
```#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>

struct node
{
int data;
struct node *left;
struct node *right;
};

struct node *newNode (int data)
{
struct node *node = (struct node *) malloc (sizeof (struct node));
node->data = data;
node->left = NULL;
node->right = NULL;

return (node);
}

bool check_element (struct node * root, int key)
{
if (root == NULL)
{
return false;
}
// Check whether same or not
if (root->data == key)
{
return true;
}

if (root->data > key)
{
// Traverse the left subtree
return check_element (root->left, key);
}
// Else Traverse the right subtree
else
{
return check_element (root->right, key);
}
}

int main ()
{
struct node *root = newNode (80);
root->left = newNode (60);
root->right = newNode (90);
root->left->left = newNode (40);
root->left->right = newNode (70);
root->left->left->left = newNode (30);
root->left->left->right = newNode (50);
if (check_element (root, 50))
{
printf ("Found\n");
}
else
{
}
return 0;
}
```

`Found`

### Related Banners

Get PrepInsta Prime & get Access to all 200+ courses offered by PrepInsta in One Subscription

## Get over 200+ course One Subscription

Courses like AI/ML, Cloud Computing, Ethical Hacking, C, C++, Java, Python, DSA (All Languages), Competitive Coding (All Languages), TCS, Infosys, Wipro, Amazon, DBMS, SQL and others

## Checkout list of all the video courses in PrepInsta Prime Subscription

### Traversals

• Traversal in Trees
• Tree Traversals: Breadth-First Search (BFS) : C | C++ | Java
• Tree Traversals: Depth First Search (DFS) : C | C++ | Java
• Construct a Binary Tree from Postorder and Inorder

### AVL Trees

• AVL Trees
• AVL Trees: Introduction
• AVL Tree Insertion : C | C++ | Java
• AVL Tree Deletion : C | C++ | Java
• Insertion in a Binary Tree (Level Order) – C | C++ | Java
• Searching in Binary Tree – C | C++ | Java
• Searching in a Binary Search Tree – C | C++ | Java

### Complete Programs for Trees

• Depth First Traversals – C | C++ | Java
• Level Order Traversal – C | C++Java
• Construct Tree from given Inorder and Preorder traversals – C | C++Java
• Construct Tree from given Postorder and Inorder traversals – C | C++Java
• Construct Tree from given Postorder and Preorder traversal – C | C++Java
• Find size of the Binary tree – C | C++Java
• Find the height of binary tree – C | C++Java
• Find maximum in binary tree – C | C++Java
• Check whether two tree are identical- CC++Java
• Spiral Order traversal of Tree- CC++Java
• Level Order Traversal Line by Line – C | C++Java
• Hand shaking lemma and some Impotant Tree Properties.
• Check If binary tree if Foldable or not.- CC++Java
• check whether tree is Symmetric – C| C++Java.
• Check for Children-Sum in Binary Tree- C|C++Java
• Sum of all nodes in Binary Tree- CC++ | Java
• Lowest Common Ancestor in Binary Tree- CC++ | Java

### Traversals

• Traversal in Trees
• Tree Traversals: Breadth-First Search (BFS) : C | C++ | Java
• Tree Traversals: Depth First Search (DFS) : C | C++ | Java
• Construct a Binary Tree from Postorder and Inorder

### AVL Trees

• AVL Trees
• AVL Trees: Introduction
• AVL Tree Insertion :  C | C++ | Java
• AVL Tree Deletion : C | C++ | Java
• Insertion in a Binary Tree (Level Order) – C | C++ | Java
• Searching in Binary Tree – C | C++ | Java
• Searching in a Binary Search Tree – C | C++ | Java

### Complete Programs for Trees

• Depth First Traversals – C | C++ | Java
• Level Order Traversal – C | C++Java
• Construct Tree from given Inorder and Preorder traversals – C | C++Java
• Construct Tree from given Postorder and Inorder traversals – C | C++Java
• Construct Tree from given Postorder and Preorder traversal – C | C++Java
• Find size of the Binary tree – C | C++Java
• Find the height of binary tree – C | C++Java
• Find maximum in binary tree – C | C++Java
• Check whether two tree are identical- CC++Java
• Spiral Order traversal of Tree- CC++Java
• Level Order Traversal LIne by Line – C | C++Java
• Hand shaking lemma and some Impotant Tree Properties.
• Check If binary tree if Foldable or not.- CC++Java
• check whether tree is Symmetric  C| C++Java.
• Check for Children-Sum in Binary Tree- C|C++Java
• Sum of all nodes in Binary Tree- CC++ | Java
• Lowest Common Ancestor in Binary Tree. CC++ | Java