What data and in what manner are they placed on the stack during program execution?

In Go, the stack is used to store local variables of functions, call parameters, and return addresses. When a function is called, a memory area is allocated on the stack where its local data is placed.

Features of the stack in Go:

• Each goroutine has its own stack, which starts with a small size (e.g., 2 KB) and can dynamically expand.
• The stack stores primitive type values, pointers, and also the return address for correct return from the function.

Example:

func add(a int, b int) int {
    sum := a + b  // the variable sum is stored on the stack
    return sum
}

Here, a, b, and sum are placed on the current goroutine's stack.

Thus, the stack serves to manage function calls and store temporary data, ensuring efficient program execution.