`luc056.c`¶

Problem Statement

If an array arr contains n elements, then write a program to check if arr[0] = arr[n-1], arr[1] = arr[n-2] and so on.

Metadata¶

Property	Detail
Author	Amit Dutta amitdutta4255@gmail.com
Date	08 Feb 2026
License	MIT License (See the LICENSE file for details)
Difficulty	Beginner (index: 2 / 10)

Concepts¶

Beta Feature

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Array
Sorting (possible)
Iteration

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Source Code¶

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

int main()
{
    int arr[100], n, i, symmetric = 1;

    printf("Enter number of elements (n): ");
    scanf("%d", &n);

    printf("Enter %d elements: ", n);
    for (i = 0; i < n; i++)
    {
        scanf("%d", &arr[i]);
    }

    // Check symmetry
    for (i = 0; i < n / 2; i++)
    {
        if (arr[i] != arr[n - 1 - i])
        {
            symmetric = 0;
            break;
        }
    }

    if (symmetric)
        printf("\nThe array is symmetric (Palindrome).\n");
    else
        printf("\nThe array is NOT symmetric.\n");

    return 0;
}

Explanation¶

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    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

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    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

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    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

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    [END]

    CODE (luc056.c):

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

    int main()
    {
        int arr[100], n, i, symmetric = 1;

        printf("Enter number of elements (n): ");
        scanf("%d", &n);

        printf("Enter %d elements: ", n);
        for (i = 0; i < n; i++)
        {
            scanf("%d", &arr[i]);
        }

        // Check symmetry
        for (i = 0; i < n / 2; i++)
        {
            if (arr[i] != arr[n - 1 - i])
            {
                symmetric = 0;
                break;
            }
        }

        if (symmetric)
            printf("\nThe array is symmetric (Palindrome).\n");
        else
            printf("\nThe array is NOT symmetric.\n");

        return 0;
    }

luc056.c¶