Why does this assign a number?

Question

Why does this code assign numbers?
letters = ['p', 'q', 'r', 's', 'p', 'u']
print(letters.index('r'))
print(letters.index('p'))
print(letters.index('q'))
print(letters.index('r'))
The code up top👆🏻👆🏻

Answer 1

The index() method returns the lowest index position of the item in the parentheses in an iterable like a string or a list.

so:

str = "foo bar"
print(str.index("f")) # output: 0 because "f" is the first item (i.e. at index position 0)

lst = ["a", "b", "c"]
print(lst.index("b")) # output: 1 because "b" is the second item (i.e. index position 1)

Answer 2

thanks David Ashton!!