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The range( ) function is an in-built function in Python. This function generates a sequence of
numbers. A sequence is a succession of values bound together by a single name. The range( )
function is generally used in the for loop to iterate over the sequence of numbers.
The general syntax for using the range( ) function is given below:
range(start, stop, step_size): The start specifies the starting point for generating numbers.
By default, it starts from 0. The stop specifies the position up to which the numbers are to be
generated (last number is not included). The step_size specifies the increment or decrement.
By default, the value of the step_size = 1 and numbers are generated with an increment
of 1. However, we can generate numbers by specifying the value of step_size ac cording to
our requirement.
range(start, stop): It generates a set of whole numbers starting from ‘start’ to ‘stop–1’.
Example: range(3, 9) is equivalent to [3, 4, 5, 6, 7, 8].
range(stop): Generates a set of whole numbers starting from 0 to (stop–1).
Example: range(6) is equivalent to [0, 1, 2, 3, 4, 5].
The start and step_size values are optional in the application of range() function and they can
be omitted.
Program 1: To print odd numbers till 10 using start, stop and step values of a range
function.
Program1.py
File Edit Format Run Options Window Help
for i in range (1, 10, 12):
print(i)
On running the above program, you will get the following output:
Output
1
3
5
7
9
Looping Statements in Python 43

