﻿ C : Check the first and last elements of an array are equal

# C Exercises: Check a given array of integers of length 1 or more and return true if the first element and the last element are equal in the given array

## C-programming basic algorithm: Exercise-34 with Solution

Write a C program to check a given array of integers of length 1 or more. Return true if the first element and the last element in the array are equal.

C Code:

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

// Function prototype for 'test'
int test(int nums[], int arr_size);

int main(void){
// Declaring variables
int arr_size;

// First test case with an array of integers
int array1[] = {1, 1, 2, 2, 1};
arr_size = sizeof(array1)/sizeof(array1);
printf("%d",test(array1, arr_size));

// Second test case with a different array of integers
int array2[] = {1, 1, 2, 1, 2, 3};
arr_size = sizeof(array2)/sizeof(array2);
printf("\n%d",test(array2, arr_size));

// Third test case with another array of integers
int array3[] =  { 12, 24, 35, 55 };
arr_size = sizeof(array3)/sizeof(array3);
printf("\n%d",test(array3, arr_size));
}

// Definition of the 'test' function
int test(int nums[], int arr_size)
{
// Checking if the array has at least one element and if the first and last elements are equal
return arr_size > 0 && nums == nums[arr_size - 1];
}
``````

Sample Output:

```1
0
0
```

Pictorial Presentation: Flowchart: C Programming Code Editor:

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