﻿ C Program: To create and display Singly Linked List - w3resource

# C Exercises: To create and display Singly Linked List

## C Singly Linked List : Exercise-1 with Solution

Write a program in C to create and display a Singly Linked List.

Visual Presentation:

Sample Solution:

C Code:

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

// Structure for a node in a linked list
struct node {
int num;                // Data of the node
struct node *nextptr;   // Address of the next node
} *stnode;                  // Pointer to the starting node

// Function prototypes
void createNodeList(int n); // Function to create the linked list
void displayList();         // Function to display the linked list

// Main function
int main() {
int n;

// Displaying the purpose of the program
printf("\n\n Linked List : To create and display Singly Linked List :\n");
printf("-------------------------------------------------------------\n");

// Inputting the number of nodes for the linked list
printf(" Input the number of nodes : ");
scanf("%d", &n);

// Creating the linked list with n nodes
createNodeList(n);

// Displaying the data entered in the linked list
printf("\n Data entered in the list : \n");
displayList();

return 0;
}

// Function to create a linked list with n nodes
void createNodeList(int n) {
struct node *fnNode, *tmp;
int num, i;

// Allocating memory for the starting node
stnode = (struct node *)malloc(sizeof(struct node));

// Checking if memory allocation is successful
if(stnode == NULL) {
printf(" Memory can not be allocated.");
} else {
// Reading data for the starting node from user input
printf(" Input data for node 1 : ");
scanf("%d", &num);
stnode->num = num;
stnode->nextptr = NULL; // Setting the next pointer to NULL
tmp = stnode;

for(i = 2; i <= n; i++) {
fnNode = (struct node *)malloc(sizeof(struct node));

// Checking if memory allocation is successful
if(fnNode == NULL) {
printf(" Memory can not be allocated.");
break;
} else {
// Reading data for each node from user input
printf(" Input data for node %d : ", i);
scanf(" %d", &num);

fnNode->num = num;      // Setting the data for fnNode
fnNode->nextptr = NULL; // Setting the next pointer to NULL

tmp->nextptr = fnNode;  // Linking the current node to fnNode
tmp = tmp->nextptr;     // Moving tmp to the next node
}
}
}
}

// Function to display the linked list
void displayList() {
struct node *tmp;

if(stnode == NULL) {
printf(" List is empty.");
} else {
tmp = stnode;

// Traversing the linked list and printing each node's data
while(tmp != NULL) {
printf(" Data = %d\n", tmp->num); // Printing the data of the current node
tmp = tmp->nextptr;               // Moving to the next node in the list
}
}
}
```
```

Sample Output:

``` Linked List : To create and display Singly Linked List :
-------------------------------------------------------------
Input the number of nodes : 3
Input data for node 1 : 5
Input data for node 2 : 6
Input data for node 3 : 7

Data entered in the list :
Data = 5
Data = 6
Data = 7
```

Flowchart:

createNodeList() :

displayList() :

C Programming Code Editor:

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