What is the differencd

Question

Int *p = (int*)malloc(sizeof(int)*100) and int arr[100] ; int *p = arr....what is the difference?

Answer 1

when you use malloc, you are dynamically allocating the memory to your int-type pointer in this example. By doing so, you can for example ask user for the size of an array, and make an array of size declared by user, which is not possible when you make arrays statically (int arr[100]; in your example) . Of course there is more to tell about pointers, but YouTube or some other users will explain it better than me