C Program to read two arrays from user, add them, and then output their sum

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

int main()
{
    int i,num;
    printf("Enter the size of the arrays  :");
    scanf("%d", &num);

    int arr1[num], arr2[num] , arr3[num] ;

    printf("enter elements in the array1 : ");

    for(i=0; i<num ; i++)
    {
        scanf("%d", &arr1[i]);
    }

      printf("enter elements in the array2 : ");

    for(i=0; i<num ; i++)
    {
        scanf("%d", &arr2[i]);
    }


    for(i=0; i<num ; i++)
    {
        arr3[i]= arr1[i]+arr2[i];
        printf("\n %d + %d = %d : : ", arr1[i], arr2[i] ,arr3[i] );
    }
return 0;
}