Python range Function

The Python range function is one of the Built-in function, which helps to generates sequence of number, or to iterate items in an iterables such as Lists, Tuples etc.

In this section, we discuss how to use this Python range function to generate numbers from a start point to end point with multiple examples.

Python range syntax

The syntax behind this range function in Python programming language is

range(start, end, step)

• Start – This is the starting number of the range. This is an optional argument. If you omit this value, Python range function will start from 0. 
• Stop – A value before this number will be the range end value. For example, range(1, 10) print values from 1 to 9.
• Step – This is an optional argument that decides the sequence of numbers generated by Python range function. This will determine the space or difference between each integer values. For example, range(1, 10, 2) returns 1, 3, 5, 7, 9. You can notice that the difference between each integer is 2.

All the arguments in the Python range function accepts integer values. Either it can be positive or Negative integers.

Python range examples

The following list of Python range function examples generate a sequence of numbers from the given starting point to end point using the specified steps. To display the range of items are more number of items in a single statement can be possible by assigning the output to a iterable.

Python List range function

In this example, we are using a single argument, which will be the stop value. The first statement will start at 0 and ends at 0. The second statement starts at 0 and stops at 5. Similarly, the last statement starts at 0 and ends at 9.

From the below code snippet, you can see, we are using the list function to bind and display the numbers generated by the range function.

TIP: I suggest you to refer the Python List article.

# Python range function example
print(list(range(0)))
 
print(list(range(5)))
 
print(list(range(10)))

OUTPUT

Python Tuple range function

In this example also, we used a single argument. However, this time we are using the tuple function to display the items generated by the range function.

TIP: I suggest you to refer the Python Tuple article.

print(tuple(range(0)))
 
print(tuple(range(5)))
 
print(tuple(range(10)))

OUTPUT

Python range function with two arguments

This examples uses range function with two arguments, and they are starting point and end point. For example, print(list(range(5, 15))) print list of values from 5 to 14 and print(list(range(150, 165))) returns list of values from 150 to 164.

print(list(range(0, 5)))
 
print(list(range(5, 15)))
 
print(list(range(10, 15)))
 
print(list(range(25, 33)))
 
print(list(range(150, 165)))

OUTPUT

In Python, you can use the negative values as the argument values of the range function. Here, we used negative values as the starting point, ending point, and both start and end points. The first statement starts at -10 and ends at 0, and the second one starts at -15 and ends at -4.

print(list(range(-10, 1)))
 
print(list(range(-15, -5)))
 
print(list(range(-19, -4)))
 
print(list(range(-5, 5)))
 
print(list(range(-122, -110)))
 
print(list(range(0, -5)))

OUTPUT

Python range function with three arguments

In this examples, we are using Python range function with three arguments, and they are starting point, ending point and steps. Here, print(list(range(0, 10, 2))) print list of numbers from 0 to 9 and the interval difference between consecutive numbers should be 2. The last statement, print(list(range(150, 500, 50))) return numbers from 150 to 499 with interval 50.

print(list(range(0, 10, 2)))
 
print(list(range(5, 25, 5)))
 
print(list(range(2, 40, 4)))
 
print(list(range(25, 100, 5)))
 
print(list(range(150, 500, 25)))
 
print(list(range(150, 500, 50)))

OUTPUT

Python range reverse

This is an example of Python range reserve. It means, you can use the range function to print items in reverse order also.

Here, we are using the negative values as the start point, end point and steps. If you use the negative values as the step argument then the Python range function returns values in reverse order.

For example, print(list(range(300, 1, -25))) returns numbers from 300 to 1 with an interval difference of 25 (300, 275, 250….).

print(list(range(-10, 1, 2)))
 
print(list(range(-45, -5, 5)))
 
print(list(range(300, 1, -25)))
 
print(list(range(-5, 15, 3)))
 
print(list(range(450, -200, -50)))
 
print(list(range(1000, 1, -75)))

OUTPUT

Python for loop range function

Until now, we are using the lists or tuples to hold the range items, and print that list as an output. Generally, we use this range function along with For Loop to iterate any iterables.

The first for loop prints values from 0 to 4, and the next for loop generate values form 0 to 9. However, within the second for loop, we are multiplying each number by 2. So, the output will be 0, 2, 4, 6 etc.

for i in range(5):
    print(i)
 
print('-----------')
for i in range(10):
    print(i * 2)

OUTPUT

In this example, we are using for loop range function with two arguments. To keep the output short, we used the end argument inside the print statement.

for i in range(10, 20):
    print(i, end = ', ')
 
print('\n')
for i in range(150, 160):
    print(i, end = ', ')
 
print('\n')
for i in range(1, 16):
    print(i, end = ', ')

OUTPUT

This is an example of Python for loop range function with three arguments. The first for loop starts at 12 and ends at 119. Here the interval difference between two numbers is 10. 

for i in range(15, 110, 10):
    print(i, end = ', ')
 
print('\n')
for i in range(150, 1, -10):
    print(i, end = ', ')
 
print('\n')
for i in range(-150, -300, -25):
    print(i, end = ', ')
 
print('\n')
for i in range(-300, -150, 25):
    print(i, end = ', ')
 
print('\n')
for i in range(-100, 500, 50):
    print(i, end = ', ')
 
print('\n')
for i in range(400, -200, -50):
    print(i, end = ', ')

OUTPUT

Python range string example

In this example, we are using the range function to print the same statement or same string for multiple times. The second statement prints Python from 1 to 4 (four times) 

for i in range(5):
    print('Python')
 
print('-----------')
for i in range(1, 5):
    print('Python')
 
print('-----------')    
for i in range(2**3):
    print('Tutorial Gateway')

OUTPUT

In this Python range string example, first we declared a string. Next, we used for loop to iterate each and every character in a string using the range function.

Within the range function, we used Len function to find the length of a string and used it as the end point of the range function. It means, range starts at 0 and ends at len(company). Within the print statement, we used the index values to print the characters.

company = 'Tutorial Gateway'
 
for i in range(len(company)):
    print(company[i], end = ', ')
 
print('\n-----------')
for i in range(0, len(company)):
    print(company[i])

OUTPUT

Python range iterator example

Let me use this range function to iterate the iterables like list and tuple. The first for loop with range is looping over list of fruits and printing them. Next for loop with range function iterates the tuple and prints the tuple items.

Fruits = ['Apple', 'Orange', 'Grape', 'Banana']
for i in range(len(Fruits)):
    print(Fruits[i])
 
print('--------------')
x = (10, 20, 30, 40, 50, 60, 70, 80, 90)
for i in range(len(x)):
    print(x[i])

OUTPUT

This is an another example of Python range iterator on string, lists, and tuples.

string = 'Tutorial Gateway'
 
for i in range(len(string)):
    print(string[i], end = ', ')
 
print('\n')
numbers_list = [10, 20, 30, 40, 50]
 
for i in range(len(numbers_list)):
    print(numbers_list[i], end = ', ')
 
print('\n')
fruits_tuple = ('apple', 'cherry', 'kiwi', 'mango')
 
for i in range(len(fruits_tuple)):
    print(fruits_tuple[i], end = ', ')

OUTPUT