Strings

String Delimiters

How do we know we have a string? What are the ways we can create a string literal? →

'single quotes'
"double quotes"
"""triple double quotes!!!"""

Strings vs Variables

What's the difference between lines two and three of the following code? →

foo = "bar"
print(foo)   # line 2
print("foo") # line 3

the first line prints the variable foo, resulting output is "bar"
the second line prints the string "foo", resulting output is "foo"

String Operations

Name some operations that we can perform on strings →

addition / concatenation: +
multiplication: *
string formatting: %

Strings Revisited

we've been looking at strings as single things (single objects)
but really, they're made of a bunch of smaller pieces
what are strings made of?→

zero or more characters!

what's special about the characters in a string? are they jumbled or in a specific order? →

strings are specifically a sequence of characters
that is, they're ordered - "cat"… c is first, a is second, t is third

Strings Revisited Continued

a string is a compound data type
a compound data type is a type in which the values are composed of zero or more other values.
strings are the first data type that we'll see that's made of other types…
(we'll see lists in the next class)
we've been using strings as a whole… (and we'll explore that further)
but, next we'll treat strings as a collection of characters…

Strings as a List of Characters