C#: Check if the first element and the last element are equal of an array of integers

Last update on June 23 2025 12:58:36 (UTC/GMT +8 hours)

First and Last Element Equal in Array

Write a C# program that checks if the first element and the last element of an array of integers are equal. The array length is 1 or more.

Pictorial Presentation:

>C# Sharp Exercises: Check if the first element and the last element are equal of an array of integers

Sample Solution:

C# Sharp Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

public class Exercise48
{  
    public static void Main() 
    {
        // Define an array of integers 'nums' with pre-defined values
        int[] nums = {1, 2, 2, 3, 3, 4, 5, 6, 5, 7, 7, 7, 8, 8, 1};

        // Check if the length of the 'nums' array is greater than or equal to 1
        // AND if the first element of the array is equal to the last element of the array
        // Print the result of the logical AND operation between these conditions
        Console.WriteLine((nums.Length >= 1) && (nums[0].Equals(nums[nums.Length - 1])));
    } 
}

Sample Output:

Array1: [1, 2, 2, 3, 3, 4, 5, 6, 5, 7, 7, 7, 8, 8, 1]                  
True

Flowchart:

For more Practice: Solve these Related Problems:

Write a C# program to check if the array has the same first and second-last element.
Write a C# program to check if the first, middle, and last elements of an array are all equal.
Write a C# program to count how many times the first element repeats in the array.
Write a C# program to rotate the array left only if the first and last elements are equal.

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