The range() function in Python is used to generate a sequence of numbers. It can take atleast one (stop) and atmost 3 arguments: start, stop, and step.

• The start argument is the first number in the sequence and is optional, if not provided it defaults to 0.
• The stop argument is the last number in the sequence (not included) and is required.
• The step argument is the difference between each number in the sequence and is optional, if not provided it defaults to 1.

The range() function returns a range object, which is an iterable sequence of numbers. It can be used in a for loop or converted to a list using the list() function.

Here are some examples of how to use the range() function:

Generating a sequence of numbers from 0 to 9:

for i in range(10):
    print(i)

This will output:

0
1
2
3
4
5
6
7
8
9

In the above example 0 (default value) will act as start argument, 10 will act as a stop argument and 1 (default value) will act as step argument of range() function.
Generating a sequence of numbers from 5 to 9:

for i in range(5, 9):
    print(i)

This will output:

5
6
7
8
9

In the above example 5 will act as start argument, 9 will act as a stop argument and 1 (default value) will act as step argument of range() function.
Generating a sequence of even numbers from 0 to 8:

for i in range(0, 9, 2):
    print(i)

This will output:

0
2
4
6
8

In the above example 0 will act as start argument, 9 will act as a stop argument and 2 will act as step argument of range() function.
Converting a range object to a list:

nums = list(range(5))
print(nums)

This will output:

[0, 1, 2, 3, 4]

It’s important to note that python 3.x range() function returns an iterator, which is different than python 2.x where it returns a list.