# Print alternate nodes of a linked list using recursion in C

In this tutorial, we will learn how to print alternate nodes of a linked list using recursion with the help of the C program? By Piyas Mukherjee Last updated : August 02, 2023

## Input

A singly linked list whose address of the first node is stored in a pointer, say head

## Output

The alternative nodes in the list

## Data Structure Used

Singly linked list where each node contains a data element say data, and the address of the immediate next node say next, with Head holding the address of the first node.

## Pseudo Code

```Function alternate_display(temp):
Begin
IF(temp!=NULL){
Print "temp->data"
If(temp->next==NULL)
temp=NULL;
Else
alternate_display(temp->next->next);
}
Else
return control to the main function
End IF-ELSE
End FUNCTION
```

## C program to print alternate nodes of a linked list using recursion

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

//node structure
typedef struct list {
int data;
struct list* next;
} node;

//recursive function
void alternatedisp(node* temp);

int main()
{
node *head = NULL, *temp, *temp1;
int choice, count = 0, key;

//Taking the linked list as input
do {
temp = (node*)malloc(sizeof(node));
if (temp != NULL) {
printf("\nEnter the element in the list : ");
scanf("%d", &temp->data);
temp->next = NULL;
}
else {
while (temp1->next != NULL) {
temp1 = temp1->next;
}
temp1->next = temp;
}
}
else {
printf("\nMemory not avilable...node allocation is not possible");
}
printf("\nIf you wish to add m ore data on the list enter 1 : ");
scanf("%d", &choice);
} while (choice == 1);

//Now displaying the alternative nodes starting from the begining
printf("\nDisplaying the alternative items of the list starting from the begining : \n");
printf("NULL\n");

return 0;
}

//recursive function to display alternative nodes
void alternatedisp(node* temp)
{
if (temp != NULL) {
printf("%d->", temp->data);
if (temp->next == NULL)
temp = NULL;
else
alternatedisp(temp->next->next);
}
else
return;
}
```

## Output

```Enter the element in the list : 7

If you wish to add m ore data on the list enter 1 : 1

Enter the element in the list : 6

If you wish to add m ore data on the list enter 1 : 1

Enter the element in the list : 5

If you wish to add m ore data on the list enter 1 : 1

Enter the element in the list : 4

If you wish to add m ore data on the list enter 1 : 1

Enter the element in the list : 3

If you wish to add m ore data on the list enter 1 : 0

Displaying the alternative items of the list starting from the begining :
7->5->3->NULL
```