By changing only the 6th line of code (without changing the function signature), is it possible to access elements added inside the function (to the triplet and the quadruple)?

In Go, if elements (for example, numbers 3 and 4) are added inside a function to a local slice variable, it is usually impossible to access them directly outside by only changing line 6 of the code and not modifying the function signature. This is because local variables of a function exist only within its scope.

However, if line 6 is responsible for returning a value or modifying a passed parameter (for example, a slice), then you can change it to return or save a reference to these elements. For example, if the function returns a slice, you can modify line 6 to return a slice with the added elements:

func example() []int {
    s := []int{1, 2}
    s = append(s, 3, 4) // line 6
    return s
}

In this case, by changing only line 6, we ensure access to the new elements through the return value. If the function does not return a slice but takes it by value, then without changing the signature, it is impossible to access the added elements.