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 value of start is 0 and for step it is set to 1.

The `xrange()` function creates a generator-like object that can be used in a `for` loop to iterate over a range of numbers, similar to the `range()` function in Python 3.

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



## Case 1: `end` is defined 

end=5
x = xrange(end)    #create a sequence of numbers from 0 to 4
print(x)
for n in x:
  print(n)

## Explanation
* **Line 1:** Here, the `end` of the range is defined as 5.
*  **Lines 2-3:** The  var `x` is pointing to the object created by the `xrange` function in line 4. 
* **Lines 4-5:** And then the `for` loop is printing the sequence of values in the object.


## Case 2: `start` and `end` are defined 

start=2
end=5
y = xrange(start,end)    #create a sequence of numbers from 2 to 5
print(y)
for n1 in y:
  print(n1)

## Explanation
* **Lines 1-2:** Here, the `start` of the range is defined as `2` and the `end` is defined as `5`.
*  **Lines 3-4:** The  var `y` is pointing to the object created by the `xrange` function in line 6. 
* **Lines 5-6:** And then the `for` loop is printing the sequence of values in the object.


## Case 3: `start`, `end`, and `step` are defined 

start=2
end=5
step=2
z = xrange(start,end,step)    #create a sequence of numbers from 3 to 10 with increment of 2
print(z)
for n2 in z:
  print(n2)

## Explanation
* **Lines 1-3:** Here, the `start` of the range is defined as `2`, the `end` is defined as `5` and `step` is defined as 2.
*  **Lines 4-5:** The  var `z` is pointing to the object created by the xrange function in line 6. 
* **Lines 6-7:** And then the `for` loop is printing the sequence of values in the object.

## Output

 The `xrange` function generates numbers up to, but not including, the end parameter. So in our output, xrange(2, 6, 2) generates the numbers 2, 4, which are the numbers greater than or equal to 2, but less than 6, that are divisible by 2.


What does xrange() function do in Python?

Used in Python 2.x, `xrange()` generates a number sequence like `range()`, taking start, end, and step parameters.

What does xrange() function do in Python?

Syntax

Xrange function parameters

Code and case examples

Case 1: end is defined

Explanation

Case 2: start and end are defined

Explanation

Case 3: start, end, and step are defined

Explanation

Output

Case 1: `end` is defined

Case 2: `start` and `end` are defined

Case 3: `start`, `end`, and `step` are defined