# Create linked list from a given array in C++ Program

C++Server Side ProgrammingProgramming

In this tutorial, we are going to learn how to create a linked list from the given array.

Let's see the steps to solve the problem.

• Initialize the array with dummy data.

• Write the struct node.

• Iterate over the array.

• Create a new node with the data.

• Insert the new node into the linked list.

• Print the linked list.

## Example

Let's see the code.

#include <bits/stdc++.h>
using namespace std;
struct Node {
int data;
Node* next;
};
struct Node* newNode(int data) {
Node* node = new Node;
node->data = data;
node->next = NULL;
return node;
}
void insertNewNode(Node** root, int data) {
Node* node = newNode(data);
Node* ptr;
if (*root == NULL) {
*root = node;
}
else {
ptr = *root;
while (ptr->next != NULL) {
ptr = ptr->next;
}
ptr->next = node;
}
}
void printLinkedList(Node* root) {
while (root != NULL) {
cout << root->data << " -> ";
root = root->next;
}
cout << "NULL" << endl;
}
Node* createLinkedList(int arr[], int n) {
Node *root = NULL;
for (int i = 0; i < n; i++) {
insertNewNode(&root, arr[i]);
}
return root;
}
int main() {
int arr[] = { 1, 2, 3, 4, 5 }, n = 5;
Node* root = createLinkedList(arr, n);
printLinkedList(root);
return 0;
}

## Output

If you run the above code, then you will get the following result.

1 -> 2 -> 3 -> 4 -> 5 -> NULL

## Conclusion

If you have any queries in the tutorial, mention them in the comment section.

Published on 28-Jan-2021 07:03:21
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