When we pass dptr (which is a pointer to a pointer) to updateValue, we allow the function to access and modify the original value indirectly.

1. ptr stores the address of value.
2. dptr stores the address of ptr.
3. Inside updateValue(int** ptr), **ptr = 50; means:
4. *ptr gives us ptr (which points to value).
5. **ptr accesses the actual value, allowing it to be modified to 50.