Explain the differences between memory management on the stack and heap in programming.

In programming, memory is usually managed by two main methods: the stack and the heap.

Stack — this is a memory area where local variables and function parameters are stored. It operates on a LIFO (last in, first out) principle. Memory in the stack is allocated and freed automatically when entering and exiting functions, which is very fast and efficient. However, the size of the stack is limited, and it cannot store large objects or data with dynamic lifetimes.

Heap — this is a memory area for dynamic allocation, where objects are created and live as long as there are references to them (in Go — the garbage collector automatically frees unused memory). Memory in the heap is allocated and freed manually or automatically, which is slower than the stack, but allows creating objects with arbitrary lifetimes and larger sizes.

Example in Go:

func example() {
    x := 10           // variable x is stored on the stack
    p := new(int)     // allocate memory on the heap
    *p = 20
}

Here, x is a local variable on the stack, and p points to memory on the heap.

Summary:

• Stack: fast allocation/deallocation, limited size, local data.
• Heap: dynamic allocation, larger size, management of object lifetimes.