Python Math: Reverse a range

Python Math: Exercise-71 with Solution

Write a Python program to reverse a range.

Sample Solution:-

Python Code:

def reversed_range(start, stop=None, step=1):
  if stop is None:	
    return range(start - step, -step, -step)
    new_start = stop - ((stop-start-1) % step + 1)
    new_end = new_start - (stop-start+step-1) // step * step
    if (stop - start) % step == 0 and step < 0: new_start -= step
    return range(new_start, new_end, -step)

print(reversed_range(1, 10, 2))

print(reversed_range(1, 5, 1))

Sample Output:

range(9, -1, -2)                                                                                              
range(4, 0, -1) 


Flowchart: Reverse a range

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program for casino simulation.
Next: Write a Python program to create a range for floating numbers.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

Share this Tutorial / Exercise on : Facebook and Twitter

Python: Tips of the Day

Getting rid of unwanted characters:

You can get rid of whitespaces or any specific character using strip methods in Python. You can use either plain strip for both sides, lstrip for the left side and rstrip for the right side only.

str="+++Welcome python+++"



+++Welcome python+++