How is the sequence of function calls managed during program execution?

In Go, the management of function call sequences is handled using a call stack. When a function is called, it is pushed onto the stack, and execution transfers to it. After the function completes, control returns to the calling function, which is lower in the stack. You can also manage the order of calls using goroutines and channels for parallel and asynchronous execution.

Example of sequential function calls:

package main
import "fmt"

func first() {
    fmt.Println("First function")
}

func second() {
    fmt.Println("Second function")
}

func main() {
    first()
    second()
}

For asynchronous execution, goroutines are used:

go first()
go second()

And synchronization can be achieved through channels or sync.WaitGroup.