The **`xrange()`** function in Python is used to generate a sequence of numbers, similar to the `range()` function. However, `xrange()` is used only in *Python 2.x* whereas `range()` is used in *Python 3.x*.

## Syntax

The general syntax for defining the xrange is:
```python
xrange(start,end,step)
```
This defines a range of numbers from start(inclusive) to end(exclusive).

## Xrange function parameters
The range function can take three parameters:
- **Start**: Specify the starting position of the sequence of numbers. 
- **End**: Specify the ending position of the sequence of numbers
- **Step**: The difference between each number in the sequence. 

It is must to define the end position. However, the start and step are optional. By default, the values of start and step have been set to 0.


## Code and case examples
The following code explains how to define an `xrange` in Python:



### Case 1: When the end is defined 

print("Specify end position only\n")
end=5
print("end position:",end)
x = xrange(end)#create a sequence of numbers from 0 to 4
print(x)
for n in x:#print the elements using a for loop
  print(n)

### Case 2: When the start and end are defined 

print("\n\nSpecify both start and end position")
start=2
end=5
print("start position:",start)
print("end position:",end)
y = xrange(start,end)#create a sequence of numbers from 2 to 5
print(y)
for n1 in y:#print the elements using a for loop
  print(n1)

### Case 3: When the start, end, and step are defined 

print("\n\nSpecify both start,end position and step")
start=2
end=5
step=2
print("start position:",start)
print("end position:",end)
print("step:",step)
z = xrange(3,10,2)#create a sequence of numbers from 3 to 10 with increment of 2
print(z)
for n2 in z:#print the elements using a for loop
  print(n2)

What does xrange() function do in Python?

Syntax

Xrange function parameters

Code and case examples

Case 1: When the end is defined

Case 2: When the start and end are defined

Case 3: When the start, end, and step are defined