2D array dynamically allocated single pointer using C

#include <stdio.h> 
#include <stdlib.h> 
  
int main() { 
   int row = 2, col = 3; 
   int *arr = (int *)malloc(row * col * sizeof(int)); 
   int i, j; 
    
   for (i = 0; i < row; i++) 
      for (j = 0; j < col; j++) 
         *(arr + i*col + j) = i + j;    
   printf("The matrix elements are:\n");
   for (i = 0; i < row; i++) {
      for (j = 0; j < col; j++) {
         printf("%d ", *(arr + i*col + j)); 
      }     
      printf("\n");
   }
   free(arr); 
   return 0; 
}