--description--

The range() function is used to generate a sequence of integers. Here is the basic syntax for the range() function:

range(start, stop, step)

The required stop argument is an integer that represents the end point for the sequence of numbers being generated. Here is an example of using the range() function:

for num in range(3):
    print(num)

The following code generates a sequence of numbers between 0 and 2. The integer 3 is not included because the stop argument is non-inclusive.

If a start argument is not specified, then the default is 0. Otherwise, you can use the optional start argument to start the sequence of integers at a integer other than 0. Here is an example of generating a sequence of integers between 1 and 4:

for num in range(1, 5):
    print(num)

By default the sequence of integers will increment by 1. But if you want to change that default, then you can use the optional step argument. Here is an example of generating a sequence of even integers between 2 and 10:

for num in range(2, 11, 2):
    print(num)

As mentioned earlier, there is only one required argument for the range() function. If you don't provide any arguments to range(), then you'll get a TypeError:

ERROR!
Traceback (most recent call last):
  File "<main.py>", line 1, in <module>
TypeError: range expected at least 1 argument, got 0

It is important to note that the range() function only accepts integers as arguments, not floats. Remember that floats are numbers with decimal points like 3.4. If you try to pass floats as arguments, you'll get a TypeError:

ERROR!
Traceback (most recent call last):
  File "<main.py>", line 1, in <module>
TypeError: 'float' object cannot be interpreted as an integer

If you want to generate a sequence of integers in decrementing order, then you can use a negative integer for the step argument, like this:

for num in range(40, 0, -10):
    print(num)

The following code prints the numbers 40, 30, 20, and 10 in that order to the console.

Another thing you can do with the range() function is create a list of integers by using it with the list constructor. The list constructor is used to convert an iterable into a list. Here is an example of generating a list of even integers between 2 and 10:

numbers = list(range(2, 11, 2))
print(numbers) # [2, 4, 6, 8, 10]

The range() function is a very handy way to generate a sequence of integers in Python. Once you get the hang of it, you'll probably find yourself using it a lot in your Python programs.

--questions--

--text--

What is the range() function used for?

--answers--

To generate a list of lists.

--feedback--

Review the beginning of the lesson for the answer.

To generate list of strings.

--feedback--

Review the beginning of the lesson for the answer.

To generate a sequence of integers.

To generate a list of characters.

--feedback--

Review the beginning of the lesson for the answer.

--video-solution--

3

--text--

Which of the following is the only required argument needed for the range() function?

--answers--

stop

start

--feedback--

Review the beginning of the lesson for the answer.

step

--feedback--

Review the beginning of the lesson for the answer.

index

--feedback--

Review the beginning of the lesson for the answer.

--video-solution--

1

--text--

Which of the following errors will be returned from the following code?

range()

--answers--

IndexError

--feedback--

This error occurs when an incompatible type is used for a given operation.

RangeError

--feedback--

This error occurs when an incompatible type is used for a given operation.

TypeError

SyntaxError

--feedback--

This error occurs when an incompatible type is used for a given operation.

--video-solution--

3