Rust Program to Add elements to a LinkedList

Add elements to a LinkedList

Rust Programming Language

Problem

Rust program that demonstrates how to add elements to a LinkedList.

Input

use std::collections::LinkedList;

fn main() {

    // create a new linked list

    let mut list = LinkedList::new();

    // add some elements to the list

    list.push_back("apple");

    list.push_back("banana");

    list.push_back("cherry");

    // print the elements of the list

    println!("LinkedList: {:?}", list);

    // add an element to the front of the list

    list.push_front("orange");

    // print the elements of the list again

    println!("LinkedList (after adding 'orange' to the front): {:?}", list);

    // add an element at a specific index

    list.insert(2, "grape");

    // print the elements of the list again

    println!("LinkedList (after adding 'grape' at index 2): {:?}", list);

}{codeBox}

Output

LinkedList: ["apple", "banana", "cherry"]

LinkedList (after adding 'orange' to the front): ["orange", "apple", "banana", "cherry"]

LinkedList (after adding 'grape' at index 2): ["orange", "apple", "grape", "banana", "cherry"]{codeBox}

Explanation

In this program, we first create a new LinkedList and add some elements to it using the push_back method. We then print the elements of the list using Rust's println! macro and the {:?} format specifier to print the list in debug format.

To add an element to the front of the list, we use the push_front method and pass in the element we want to add as an argument. This inserts the element at the beginning of the list, before all other elements.

To add an element at a specific index, we use the insert method and pass in the index where we want to insert the element, as well as the element itself. In this example, we insert the element "grape" at index 2, which shifts the existing elements "banana" and "cherry" to higher indices.

After each addition, we print the elements of the list again to see the updated contents.