int MChoice (int choiceResult) {

int result; cout<< "Welcome to my Machine"<>choice;

while(cin.fail()) {

cin.clear(); cin.ignore(50,' '); cout<<"Input must be numeric. Try again "; cin >> choice;

}

while (choice <= -1 || choice >= 4) { cout<<"Invalid Input. "; cout<<"Try again from the menu: "; cin >>choice; } result = choice;

return result;

}

i am trying to convert this into swift programming (background)