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Golang Program to update the ith index node value, when index is at 0 index.
Examples
Approach to solve this problem
Step 1 − Define a method that accepts the head of a linked list.
Step 2 − If head == nil, return the head.
Step 3 − Initialize the index as i := 0.
Step 4 − Iterate the given linked list from its head.
Step 5 − If index i matches with given index (to be updated), then update that node.
Step 6 − Else, return the head.
Example
package main import "fmt" type Node struct { value int next *Node } func NewNode(value int, next *Node) *Node{ var n Node n.value = value n.next = next return &n } func TraverseLinkedList(head *Node){ temp := head for temp != nil { fmt.Printf("%d ", temp.value) temp = temp.next } fmt.Println() } func UpdateKthIndexNode(head *Node, index , data int) *Node{ if head == nil{ return head } i := 0 temp := head for temp != nil{ if i == index{ temp.value = data break } i++ temp = temp.next } return head } func main(){ head := NewNode(30, NewNode(10, NewNode(40, NewNode(40, nil)))) fmt.Printf("Input Linked list is: ") TraverseLinkedList(head) index := 0 head = UpdateKthIndexNode(head, index, 15) fmt.Printf("Update %dth index node, Linked List is: ", index) TraverseLinkedList(head) }
Output
Input Linked list is: 30 10 40 40 Update 0th index node, Linked List is: 15 10 40 40
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