Sum of elements in array using pointers

#include <stdio.h>

int main() {

int sum = 0, n;

int *ptr;

printf("Enter the size of array : ");

scanf("%d", &n);

int a[n];

for(int i = 0 ; i <= n - 1 ; i++){

printf("Enter an element : ");

scanf("%d", &a[i]);

}

ptr = a;

for(int i = 0 ; i < n ; i++){

sum = sum + *(ptr + i);

}

printf("%d", sum);

}

Output:

Enter the size of array : 4

Enter an element : 1

Enter an element : 2

Enter an element : 3

Enter an element : 4

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