range Objects

What is a range object?

A range object is like a list of numbers, though not technically a list. This list of numbers changes based on the parameters given.

range(number) will return a range object with integers from 0 to number - 1

range(number1, number2) will return a range object with integers from number1 to number2 - 1

range(number1, number2, difference) will return a range object starting with number1, and will continue to give numbers using the given difference until reaching number2

Here's a few examples:

range(5) --> (0, 1, 2, 3, 4)

range(7) --> (0, 1, 2, 3, 4, 5, 6)

range(3, 9) --> (3, 4, 5, 6, 7, 8)

range(-3, 3) --> (-3, -2, -1, 0, 1, 2)

range(5, 20, 3) --> (5, 8, 11, 14, 17)

range(10, 5, -1) --> (10 , 9, 8, 7, 6)

Using The iterator Variable

In the for loop header, you create a variable called the iterator. This variable changes through each iteration.

You can name this variable whatever you want, but it's good to name it in a way that you know what it is.

for counter in range(5): The iterator is named counter

print( counter ) This will print the value of your iterator each time. (0, 1, 2, 3, then 4)

The reason this loop runs 5 times is that there are 5 total numbers in the range(5) object.