>>> index=0

>>> while index<len(numbers):

... print(numbers[index]**2)

... index += 1

...

1

4

9

>>> numbers

[1, 2, 3]

>>> numbers[0]=10

>>> numbers

[10, 2, 3]

>>> del numbers[0]

>>> numbers

[2, 3]

>>> dir(list)

['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']

>>> numbers

[2, 3]

>>> numbers.append(1)

>>> numbers

[2, 3, 1]

>>> numbers.insert(0,4)

>>> numbers

[4, 2, 3, 1]

>>> numbers.pop()

1

>>> numbers.remove(4)

>>> numbers

[2, 3]

>>> numbers.index(2)

0

>>> numbers.count(2)

1

>>> numbers

[2, 3]

>>> numbers.append(1)

>>> numbers.append(-1)

>>> numbers

[2, 3, 1, -1]

>>> help(list.append)

>>> numbers.reverse()

>>> numbers

[-1, 1, 3, 2]

>>> numbers.sort()

>>> numbers

[-1, 1, 2, 3]

>>> numbers.sort(reverse=True)

>>> numbers

[3, 2, 1, -1]