What does craig mean when he says "string literals" or "boolean literals"? What does "literals" mean?

Hi there, Ryan Butts! A "literal" in computer science is a fixed value. For instance, the string "hello world" is a string literal. The "opposite" of a literal (if you want to think of it that way), is a variable.

Take this example:

my_string = "Hello World"
my_bool = True

print("Hi, Ryan")  # print a string literal
print(my_string)  # print a variable
print(my_bool)    # print a variable
print(False)          # print a boolean literal

The variable my_string holds a string literal of "Hello World". And the variable my_bool holds the boolean literal True. Because variables are just that, they don't really have a type until they are defined. Thus, if I were to say I'm printing a boolean literal, I would mean that I'm either printing True or False as opposed to a variable that holds that value.

Hope this helps!