1. CS1110
Today: collections

2. Let’s grade all the students
Repetition
Groups of students
String is one example of a group
Contain several characters
Today: various types that collect several things in one variable

3. Ordered Collection Type that has other things inside it
Ordered: a first thing, second, third, …
Sequence

4. Ordered Collections Type Stores Syntax Mutable? Range int range(3, 7)No
Str
character “”
Tuple
anything
( , , )
List
[ , , ]
Yes

5. Operations on Sequences
Syntax
Range?
Str?
Tuple?
List?
length
len(s)
Yes
yes
index
s[1]
slice
s[1:3]
concatenate
s1 + s2 no
multiply
s*4
assignment
s[1] = 5 No
Yes (mutable)