>>> index = 0
>>> text = 'Hello, C88C!'
>>> text
'Hello, C88C!'
>>> text[0]
'H'
>>> text[1]
'e'
>>> text[7]
'C'
>>> while index < len(text):
... print('Letter is: ' + text[index])
  File "<stdin>", line 2
    print('Letter is: ' + text[index])
    ^
IndentationError: expected an indented block after 'while' statement on line 1
>>> while index < len(text):
...     print('Letter is: ' + text[index])
...     index = index + 1
...
Letter is: H
Letter is: e
Letter is: l
Letter is: l
Letter is: o
Letter is: ,
Letter is:
Letter is: C
Letter is: 8
Letter is: 8
Letter is: C
Letter is: !
>>> index
12
>>> len(text)
12
>>>
>>>
>>> for letter in text:
...     print('Letter is: ' + letter)
...
Letter is: H
Letter is: e
Letter is: l
Letter is: l
Letter is: o
Letter is: ,
Letter is:
Letter is: C
Letter is: 8
Letter is: 8
Letter is: C
Letter is: !
>>> text
'Hello, C88C!'
>>> text[0]
'H'
>>> for thing in text:
...     print(thing)
...
H
e
l
l
o
,

C
8
8
C
!
>>> for number in range(10):
...     print(number)
...
0
1
2
3
4
5
6
7
8
9
>>> num = 0
>>> while num <= 9
  File "<stdin>", line 1
    while num <= 9
                  ^
SyntaxError: expected ':'
>>> while num <= 9:
...     print(num)
...     num += 1
...
0
1
2
3
4
5
6
7
8
9
>>> for number in range(1, 11):
...     print(number)
...
1
2
3
4
5
6
7
8
9
10
>>> range(10)
range(0, 10)
>>> range(100000000000000000000)
range(0, 100000000000000000000)
>>> range(10)
range(0, 10)
>>> list( range(10) )
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> nums = list( range(10) )
>>> nums
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> len(nums)
10
>>> text
'Hello, C88C!'
>>> len(text)
12
>>> text[11]
'!'
>>> list( range(1, 11) )
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> list( range(1, 11, 2) )
[1, 3, 5, 7, 9]
>>> help(range)
Help on class range in module builtins:

class range(object)
 |  range(stop) -> range object
 |  range(start, stop[, step]) -> range object
 |
 |  Return an object that produces a sequence of integers from start (inclusive)
 |  to stop (exclusive) by step.  range(i, j) produces i, i+1, i+2, ..., j-1.
 |  start defaults to 0, and stop is omitted!  range(4) produces 0, 1, 2, 3.
 |  These are exactly the valid indices for a list of 4 elements.
 |  When step is given, it specifies the increment (or decrement).
 |
 |  Methods defined here:
 |
 |  __bool__(self, /)
 |      True if self else False
 |
 |  __contains__(self, key, /)
 |      Return key in self.

>>>
>>>
>>> courses = ['CS88', 'DATA8', 'POLSCI2', 'PHILR1B']
>>> courses
['CS88', 'DATA8', 'POLSCI2', 'PHILR1B']
>>> courses[0]
'CS88'
>>> courses[4]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: list index out of range
>>> courses[3]
'PHILR1B'
>>> for course in courses:
...     print('I am taking ' + course)
...
I am taking CS88
I am taking DATA8
I am taking POLSCI2
I am taking PHILR1B
>>> courses
['CS88', 'DATA8', 'POLSCI2', 'PHILR1B']
>>> courses + ['MATH1A']
['CS88', 'DATA8', 'POLSCI2', 'PHILR1B', 'MATH1A']
>>> courses + 'MATH1A'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can only concatenate list (not "str") to list
>>> courses - ['MATH1A']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for -: 'list' and 'list'
>>>
>>>
>>>
>>> text = 'I am taking C88C'
>>> text
'I am taking C88C'
>>> text.split(' ')
['I', 'am', 'taking', 'C88C']
>>> text.split()
['I', 'am', 'taking', 'C88C']
>>> text.split('')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: empty separator
>>> text.split('88')
['I am taking C', 'C']
>>> words = text.split(' ')
>>> words
['I', 'am', 'taking', 'C88C']
>>> text
'I am taking C88C'
>>> for word in words:
...     print(word[0])
...
I
a
t
C
>>> courses
['CS88', 'DATA8', 'POLSCI2', 'PHILR1B']
>>> courses.pop()
'PHILR1B'
>>> course
'PHILR1B'
>>> courses.pop(0)
'CS88'
>>> help(courses.insert)
Help on built-in function insert:

insert(index, object, /) method of builtins.list instance
    Insert object before index.

>>> courses.insert(0, 'C88C')
>>> courses
['C88C', 'DATA8', 'POLSCI2']
>>>