The for loop and the range() function in Python

In Python, the for loop and range() is different from languages like C or Java. Here we show you some examples:

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# geekole.com

for i in range(5, 10):
    print(i)

When executing the code we get this result:

For loop and range() in Python

Using the range() function, iterates over a sequence from 5 to 9 (10 is not included).

One way to simplify the use of range() is to use only the maximum value:

# geekole.com
for i in range(10):
    print(i)

The range() function returns values ranging from 0 to 10, it was not necessary to specify that it starts from 0.

For loop and range() in Python

The for loop with the range() function, also allows you to iterate over a range not only by incrementing by 1, you can also increment by specifying a value as shown below:

# geekole.com
for i in range(0, 10, 2):
    print(i)

print()

for i in range(0, -10, -2):
    print(i)

The result is two sequences of values where at each iteration the increment is 2 and -2.

For loop and range() in Python

Iterate over a list in Python

Another form of the for loop in Python is the one that allows you to iterate over the elements of a tuple or list.

# geekole.com

for i in (3, 5, 3, 6, 100):
    print(i)

This would be the result:

For loop and range() in Python

One more variant of for in Python that can be useful depending on the case is one that allows you to execute a block of code once iterations over a list have finished, the for-else loop.

# geekole.com
for i in (3, 5, 3, 6, 100):
    print(i)
else:
    print("Finished")

At the end of the iterations of the for loop, “Finished” will be printed.

For loop and range() in Python

Note: The screenshots in these examples are edited and run on the Visual Studio Code.

We hope this examples of how to use for loop and range() in Python will be useful for you.