Python - Ask For Input Multiple Times Til A Certain Input Disables It

I am trying to write a function that makes a list. The function requires user input. The function will prompt for input in which user input an element. That element will be added t

Solution 1:

This is the way I'd do what you want to achieve:

final_list = []
while1:
    user_input = input("Input an element: ")
    if user_input == "Stop":
        break
    final_list.append(user_input)

print(final_list)

To incorporate this into your existing code:

deflist_maker():
    """Make a list from input"""
    result = []
    while1:
        user_input = input("Input an element: ")
        if user_input == "Stop":
            break
        result.append(user_input)
    print(result)

list_maker()

This while loop goes on until the if statement inside triggers. The break inside the if causes the loop to exit, and then does whatever is after the loop.

This is how it looks when you run the program:

Inputanelement: 100Inputanelement: 200Inputanelement: 300Inputanelement: Stop[100, 200, 300]

---

The method that you tried wasn't working is because you never actually added element to the result list. If you still wanted to use a recursive solution rather than a while loop, just add a line of code that appends element to the list:

deflist_maker():
    """Make a list from input"""
    result = []
    defmain():
        element = input("Input an element: ")
        if element == "Stop":
            print(result)
        else:
            result.append(element) # Added
            main()
    main()

list_maker()

Solution 2:

You don't need a break, nor do you need to do this recursively. Keep it simple:

deflist_maker(result):
    """Make a list from input"""
    element = input("Input an element: ")
    while element != "Stop":
        result.append(int(element))  # In your example you listed numbers, not strings, the int() function will turn the element into a number
        element = input("Input an element: ")

result = []
list_maker(result)
print(result)

If you want the result to exist outside of the function, you need to declare it outside the function. Lists are mutable, which means the append function will actually change the result list inside the function. That way you can print it out after the list_maker has run. You might want to make it easier for the user to quit. Update the while line to this and it will exit if they don't type in a number:

while element.isdigit():